./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-channel-sum.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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:49:26,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:49:26,563 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:49:26,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:49:26,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:49:26,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:49:26,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:49:26,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:49:26,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:49:26,609 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:49:26,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:49:26,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:49:26,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:49:26,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:49:26,611 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:49:26,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:49:26,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:49:26,612 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:49:26,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:49:26,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:49:26,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:49:26,616 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:49:26,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:49:26,617 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:49:26,617 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:49:26,617 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:49:26,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:49:26,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:49:26,618 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:49:26,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:49:26,619 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:49:26,619 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:49:26,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:49:26,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:49:26,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:49:26,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:49:26,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:49:26,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:49:26,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:49:26,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:49:26,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:49:26,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:49:26,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-19 01:49:26,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:49:26,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:49:26,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:49:26,916 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:49:26,916 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:49:26,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-19 01:49:28,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:49:28,667 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:49:28,668 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-19 01:49:28,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e512e81/7092e870627141da9723620fd25f7fb8/FLAGcd22d8869 [2024-11-19 01:49:29,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e512e81/7092e870627141da9723620fd25f7fb8 [2024-11-19 01:49:29,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:49:29,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:49:29,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:49:29,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:49:29,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:49:29,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41de7717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29, skipping insertion in model container [2024-11-19 01:49:29,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,055 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:49:29,283 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-channel-sum.wvr.c[2423,2436] [2024-11-19 01:49:29,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:49:29,313 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:49:29,340 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-channel-sum.wvr.c[2423,2436] [2024-11-19 01:49:29,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:49:29,366 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:49:29,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29 WrapperNode [2024-11-19 01:49:29,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:49:29,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:49:29,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:49:29,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:49:29,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,410 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2024-11-19 01:49:29,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:49:29,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:49:29,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:49:29,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:49:29,438 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,442 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,465 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 01:49:29,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,479 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:49:29,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:49:29,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:49:29,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:49:29,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (1/1) ... [2024-11-19 01:49:29,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:49:29,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:29,537 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) [2024-11-19 01:49:29,541 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 [2024-11-19 01:49:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:49:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:49:29,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:49:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:49:29,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:49:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:49:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:49:29,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:49:29,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:49:29,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:49:29,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:49:29,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:49:29,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:49:29,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:49:29,605 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:49:29,737 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:49:29,739 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:49:29,986 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:49:29,986 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:49:30,180 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:49:30,180 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:49:30,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:49:30 BoogieIcfgContainer [2024-11-19 01:49:30,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:49:30,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:49:30,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:49:30,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:49:30,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:49:29" (1/3) ... [2024-11-19 01:49:30,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c32799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:49:30, skipping insertion in model container [2024-11-19 01:49:30,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:29" (2/3) ... [2024-11-19 01:49:30,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c32799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:49:30, skipping insertion in model container [2024-11-19 01:49:30,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:49:30" (3/3) ... [2024-11-19 01:49:30,191 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-19 01:49:30,206 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:49:30,207 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:49:30,207 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:49:30,255 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:49:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2024-11-19 01:49:30,317 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2024-11-19 01:49:30,317 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:49:30,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-19 01:49:30,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2024-11-19 01:49:30,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 78 flow [2024-11-19 01:49:30,339 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:49:30,346 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;@1fd4f21b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:49:30,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:49:30,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:49:30,364 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-19 01:49:30,364 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:49:30,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:30,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:30,366 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:30,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1803493828, now seen corresponding path program 1 times [2024-11-19 01:49:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:30,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870663398] [2024-11-19 01:49:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870663398] [2024-11-19 01:49:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870663398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:30,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:30,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:49:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131399310] [2024-11-19 01:49:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:30,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 01:49:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 01:49:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 01:49:30,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-19 01:49:30,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-19 01:49:30,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:30,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-19 01:49:30,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:30,834 INFO L124 PetriNetUnfolderBase]: 203/343 cut-off events. [2024-11-19 01:49:30,836 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-19 01:49:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 343 events. 203/343 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1236 event pairs, 137 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 599. Up to 306 conditions per place. [2024-11-19 01:49:30,847 INFO L140 encePairwiseOnDemand]: 35/36 looper letters, 24 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2024-11-19 01:49:30,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 124 flow [2024-11-19 01:49:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 01:49:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-19 01:49:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-11-19 01:49:30,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-19 01:49:30,862 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 2 states and 45 transitions. [2024-11-19 01:49:30,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 124 flow [2024-11-19 01:49:30,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:49:30,869 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 68 flow [2024-11-19 01:49:30,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-19 01:49:30,877 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-19 01:49:30,878 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 68 flow [2024-11-19 01:49:30,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-19 01:49:30,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:30,879 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] [2024-11-19 01:49:30,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:49:30,881 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:30,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:30,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1165612234, now seen corresponding path program 1 times [2024-11-19 01:49:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308903860] [2024-11-19 01:49:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:31,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308903860] [2024-11-19 01:49:31,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308903860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:31,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:31,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:49:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338269233] [2024-11-19 01:49:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:31,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:49:31,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:49:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:49:31,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-19 01:49:31,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-19 01:49:31,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:31,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-19 01:49:31,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:31,287 INFO L124 PetriNetUnfolderBase]: 278/494 cut-off events. [2024-11-19 01:49:31,288 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 01:49:31,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 494 events. 278/494 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2133 event pairs, 108 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 965. Up to 252 conditions per place. [2024-11-19 01:49:31,297 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 38 selfloop transitions, 2 changer transitions 2/50 dead transitions. [2024-11-19 01:49:31,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 191 flow [2024-11-19 01:49:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:49:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:49:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-19 01:49:31,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-11-19 01:49:31,301 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 68 flow. Second operand 3 states and 73 transitions. [2024-11-19 01:49:31,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 191 flow [2024-11-19 01:49:31,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:49:31,306 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 80 flow [2024-11-19 01:49:31,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-19 01:49:31,309 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2024-11-19 01:49:31,310 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 80 flow [2024-11-19 01:49:31,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-19 01:49:31,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:31,310 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] [2024-11-19 01:49:31,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:49:31,311 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:31,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -519027332, now seen corresponding path program 1 times [2024-11-19 01:49:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:31,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140433797] [2024-11-19 01:49:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:31,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140433797] [2024-11-19 01:49:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140433797] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:49:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615963779] [2024-11-19 01:49:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:31,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:49:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:49:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:49:31,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:49:31,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-19 01:49:31,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:31,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:49:31,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:31,556 INFO L124 PetriNetUnfolderBase]: 282/531 cut-off events. [2024-11-19 01:49:31,557 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-19 01:49:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 531 events. 282/531 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1970 event pairs, 114 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1088. Up to 341 conditions per place. [2024-11-19 01:49:31,562 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 33 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-11-19 01:49:31,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 190 flow [2024-11-19 01:49:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:49:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:49:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-19 01:49:31,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-19 01:49:31,566 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 80 flow. Second operand 3 states and 64 transitions. [2024-11-19 01:49:31,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 190 flow [2024-11-19 01:49:31,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:31,570 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 106 flow [2024-11-19 01:49:31,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-19 01:49:31,571 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-11-19 01:49:31,571 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 106 flow [2024-11-19 01:49:31,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-19 01:49:31,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:31,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:31,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:49:31,572 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:31,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2097907175, now seen corresponding path program 1 times [2024-11-19 01:49:31,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:31,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280171176] [2024-11-19 01:49:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:31,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280171176] [2024-11-19 01:49:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280171176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:31,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:31,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:49:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241317830] [2024-11-19 01:49:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:31,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:49:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:49:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:49:31,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-19 01:49:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-19 01:49:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:31,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-19 01:49:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:31,921 INFO L124 PetriNetUnfolderBase]: 262/514 cut-off events. [2024-11-19 01:49:31,922 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-19 01:49:31,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 514 events. 262/514 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1912 event pairs, 203 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1178. Up to 471 conditions per place. [2024-11-19 01:49:31,926 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 25 selfloop transitions, 3 changer transitions 9/45 dead transitions. [2024-11-19 01:49:31,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 202 flow [2024-11-19 01:49:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:49:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:49:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-19 01:49:31,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-19 01:49:31,928 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 106 flow. Second operand 4 states and 75 transitions. [2024-11-19 01:49:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 202 flow [2024-11-19 01:49:31,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:31,933 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 118 flow [2024-11-19 01:49:31,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-19 01:49:31,934 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-11-19 01:49:31,935 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 118 flow [2024-11-19 01:49:31,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-19 01:49:31,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:31,936 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:31,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:49:31,937 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:31,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1960581350, now seen corresponding path program 1 times [2024-11-19 01:49:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:31,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196618258] [2024-11-19 01:49:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:32,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196618258] [2024-11-19 01:49:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196618258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:32,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646565520] [2024-11-19 01:49:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:32,826 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) [2024-11-19 01:49:32,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:49:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:32,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 01:49:32,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:33,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-19 01:49:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:33,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:34,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-19 01:49:34,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:34,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-19 01:49:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646565520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:34,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:34,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-11-19 01:49:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268288036] [2024-11-19 01:49:34,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:34,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 01:49:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 01:49:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:49:34,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:49:34,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 118 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 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) [2024-11-19 01:49:34,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:34,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:49:34,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:36,708 INFO L124 PetriNetUnfolderBase]: 796/1505 cut-off events. [2024-11-19 01:49:36,709 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-19 01:49:36,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1505 events. 796/1505 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7997 event pairs, 63 based on Foata normal form. 2/1368 useless extension candidates. Maximal degree in co-relation 3432. Up to 308 conditions per place. [2024-11-19 01:49:36,762 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 149 selfloop transitions, 82 changer transitions 59/296 dead transitions. [2024-11-19 01:49:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 296 transitions, 1426 flow [2024-11-19 01:49:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-19 01:49:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-19 01:49:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 606 transitions. [2024-11-19 01:49:36,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-11-19 01:49:36,770 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 118 flow. Second operand 40 states and 606 transitions. [2024-11-19 01:49:36,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 296 transitions, 1426 flow [2024-11-19 01:49:36,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 296 transitions, 1376 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-11-19 01:49:36,778 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 752 flow [2024-11-19 01:49:36,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=752, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-11-19 01:49:36,782 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 69 predicate places. [2024-11-19 01:49:36,782 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 752 flow [2024-11-19 01:49:36,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 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) [2024-11-19 01:49:36,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:36,783 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:36,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:49:36,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:36,984 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:36,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1366326741, now seen corresponding path program 1 times [2024-11-19 01:49:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480826228] [2024-11-19 01:49:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:49:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480826228] [2024-11-19 01:49:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480826228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:37,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:49:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447853219] [2024-11-19 01:49:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:37,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:49:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:49:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:49:37,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-19 01:49:37,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 752 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-19 01:49:37,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:37,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-19 01:49:37,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:37,299 INFO L124 PetriNetUnfolderBase]: 657/1222 cut-off events. [2024-11-19 01:49:37,299 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-11-19 01:49:37,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1222 events. 657/1222 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6081 event pairs, 203 based on Foata normal form. 4/1225 useless extension candidates. Maximal degree in co-relation 4484. Up to 1065 conditions per place. [2024-11-19 01:49:37,313 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 104 selfloop transitions, 2 changer transitions 4/117 dead transitions. [2024-11-19 01:49:37,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 976 flow [2024-11-19 01:49:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:49:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:49:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-19 01:49:37,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-19 01:49:37,315 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 752 flow. Second operand 3 states and 66 transitions. [2024-11-19 01:49:37,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 976 flow [2024-11-19 01:49:37,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 877 flow, removed 41 selfloop flow, removed 15 redundant places. [2024-11-19 01:49:37,339 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 529 flow [2024-11-19 01:49:37,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-11-19 01:49:37,341 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 45 predicate places. [2024-11-19 01:49:37,341 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 529 flow [2024-11-19 01:49:37,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-19 01:49:37,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:37,342 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:37,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 01:49:37,342 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:37,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1340435701, now seen corresponding path program 2 times [2024-11-19 01:49:37,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:37,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617786602] [2024-11-19 01:49:37,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:37,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:37,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617786602] [2024-11-19 01:49:38,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617786602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119849238] [2024-11-19 01:49:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:38,082 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) [2024-11-19 01:49:38,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:49:38,158 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:38,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:38,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:49:38,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:38,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:38,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:38,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-19 01:49:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119849238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:38,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 19 [2024-11-19 01:49:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917315573] [2024-11-19 01:49:38,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:38,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 01:49:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 01:49:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-11-19 01:49:38,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:49:38,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 529 flow. Second operand has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 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) [2024-11-19 01:49:38,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:38,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:49:38,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:39,303 INFO L124 PetriNetUnfolderBase]: 821/1582 cut-off events. [2024-11-19 01:49:39,304 INFO L125 PetriNetUnfolderBase]: For 2841/2841 co-relation queries the response was YES. [2024-11-19 01:49:39,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5395 conditions, 1582 events. 821/1582 cut-off events. For 2841/2841 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8637 event pairs, 85 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 5370. Up to 601 conditions per place. [2024-11-19 01:49:39,318 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 141 selfloop transitions, 34 changer transitions 14/196 dead transitions. [2024-11-19 01:49:39,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1467 flow [2024-11-19 01:49:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:49:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:49:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 251 transitions. [2024-11-19 01:49:39,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357638888888889 [2024-11-19 01:49:39,321 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 529 flow. Second operand 16 states and 251 transitions. [2024-11-19 01:49:39,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1467 flow [2024-11-19 01:49:39,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 196 transitions, 1464 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:39,374 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 707 flow [2024-11-19 01:49:39,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=707, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2024-11-19 01:49:39,375 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2024-11-19 01:49:39,376 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 707 flow [2024-11-19 01:49:39,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 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) [2024-11-19 01:49:39,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:39,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:39,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:39,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 01:49:39,581 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:39,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2012483246, now seen corresponding path program 3 times [2024-11-19 01:49:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433034286] [2024-11-19 01:49:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:39,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:49:39,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:49:39,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433034286] [2024-11-19 01:49:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433034286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325858267] [2024-11-19 01:49:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:39,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:39,746 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) [2024-11-19 01:49:39,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:49:39,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:49:39,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:39,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:39,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:39,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:39,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325858267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:39,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:39,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2024-11-19 01:49:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236696948] [2024-11-19 01:49:39,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:39,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:49:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:49:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:49:40,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:49:40,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 707 flow. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 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) [2024-11-19 01:49:40,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:40,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:49:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:40,492 INFO L124 PetriNetUnfolderBase]: 1177/2156 cut-off events. [2024-11-19 01:49:40,492 INFO L125 PetriNetUnfolderBase]: For 6653/6653 co-relation queries the response was YES. [2024-11-19 01:49:40,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8260 conditions, 2156 events. 1177/2156 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10641 event pairs, 294 based on Foata normal form. 62/2205 useless extension candidates. Maximal degree in co-relation 8231. Up to 703 conditions per place. [2024-11-19 01:49:40,509 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 98 selfloop transitions, 34 changer transitions 55/194 dead transitions. [2024-11-19 01:49:40,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 194 transitions, 1618 flow [2024-11-19 01:49:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:49:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:49:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-11-19 01:49:40,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-19 01:49:40,511 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 707 flow. Second operand 12 states and 200 transitions. [2024-11-19 01:49:40,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 194 transitions, 1618 flow [2024-11-19 01:49:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 194 transitions, 1554 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 01:49:40,531 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 748 flow [2024-11-19 01:49:40,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=748, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-11-19 01:49:40,533 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-11-19 01:49:40,533 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 748 flow [2024-11-19 01:49:40,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 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) [2024-11-19 01:49:40,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:40,533 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:40,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:40,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:40,734 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:40,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -371141210, now seen corresponding path program 4 times [2024-11-19 01:49:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:40,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990487124] [2024-11-19 01:49:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:40,763 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:40,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:49:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990487124] [2024-11-19 01:49:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990487124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:40,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:40,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:49:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887166034] [2024-11-19 01:49:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:40,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:49:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:49:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:49:40,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-19 01:49:40,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-11-19 01:49:40,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:40,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-19 01:49:40,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:41,275 INFO L124 PetriNetUnfolderBase]: 1390/2528 cut-off events. [2024-11-19 01:49:41,276 INFO L125 PetriNetUnfolderBase]: For 9703/9703 co-relation queries the response was YES. [2024-11-19 01:49:41,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10058 conditions, 2528 events. 1390/2528 cut-off events. For 9703/9703 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12500 event pairs, 302 based on Foata normal form. 127/2654 useless extension candidates. Maximal degree in co-relation 10026. Up to 1259 conditions per place. [2024-11-19 01:49:41,297 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 109 selfloop transitions, 4 changer transitions 2/122 dead transitions. [2024-11-19 01:49:41,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 1179 flow [2024-11-19 01:49:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:49:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:49:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-19 01:49:41,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-11-19 01:49:41,299 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 748 flow. Second operand 4 states and 77 transitions. [2024-11-19 01:49:41,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 1179 flow [2024-11-19 01:49:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1051 flow, removed 30 selfloop flow, removed 16 redundant places. [2024-11-19 01:49:41,326 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 664 flow [2024-11-19 01:49:41,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=664, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-11-19 01:49:41,327 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2024-11-19 01:49:41,328 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 664 flow [2024-11-19 01:49:41,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-11-19 01:49:41,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:41,329 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:41,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:49:41,329 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:41,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1633699317, now seen corresponding path program 1 times [2024-11-19 01:49:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:41,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138000623] [2024-11-19 01:49:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138000623] [2024-11-19 01:49:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138000623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84811551] [2024-11-19 01:49:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:42,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:42,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:49:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:42,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 01:49:42,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:43,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:44,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:44,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-19 01:49:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:44,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84811551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:44,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:44,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-19 01:49:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332542360] [2024-11-19 01:49:44,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:44,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 01:49:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 01:49:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2024-11-19 01:49:44,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:49:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 664 flow. Second operand has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 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) [2024-11-19 01:49:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:49:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:18,142 INFO L124 PetriNetUnfolderBase]: 13949/26223 cut-off events. [2024-11-19 01:50:18,143 INFO L125 PetriNetUnfolderBase]: For 67036/67036 co-relation queries the response was YES. [2024-11-19 01:50:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94494 conditions, 26223 events. 13949/26223 cut-off events. For 67036/67036 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 214283 event pairs, 963 based on Foata normal form. 207/26345 useless extension candidates. Maximal degree in co-relation 94469. Up to 6051 conditions per place. [2024-11-19 01:50:18,377 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1131 selfloop transitions, 1313 changer transitions 486/2938 dead transitions. [2024-11-19 01:50:18,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 2938 transitions, 23492 flow [2024-11-19 01:50:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2024-11-19 01:50:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2024-11-19 01:50:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 5038 transitions. [2024-11-19 01:50:18,401 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.400986946832219 [2024-11-19 01:50:18,403 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 664 flow. Second operand 349 states and 5038 transitions. [2024-11-19 01:50:18,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 2938 transitions, 23492 flow [2024-11-19 01:50:18,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2938 transitions, 23074 flow, removed 207 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:18,769 INFO L231 Difference]: Finished difference. Result has 581 places, 1459 transitions, 15406 flow [2024-11-19 01:50:18,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=349, PETRI_FLOW=15406, PETRI_PLACES=581, PETRI_TRANSITIONS=1459} [2024-11-19 01:50:18,770 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 546 predicate places. [2024-11-19 01:50:18,770 INFO L471 AbstractCegarLoop]: Abstraction has has 581 places, 1459 transitions, 15406 flow [2024-11-19 01:50:18,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 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) [2024-11-19 01:50:18,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:18,772 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:18,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:50:18,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:18,975 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:18,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1899916915, now seen corresponding path program 2 times [2024-11-19 01:50:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:18,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082624920] [2024-11-19 01:50:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:19,014 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:19,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082624920] [2024-11-19 01:50:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082624920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654634601] [2024-11-19 01:50:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:20,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:20,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:20,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:50:20,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:20,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:20,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 01:50:20,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:21,149 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-19 01:50:21,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 21 [2024-11-19 01:50:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:21,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:21,707 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-19 01:50:21,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-19 01:50:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654634601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:22,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-11-19 01:50:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065983046] [2024-11-19 01:50:22,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:22,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 01:50:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 01:50:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1719, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 01:50:22,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-19 01:50:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1459 transitions, 15406 flow. Second operand has 45 states, 45 states have (on average 10.066666666666666) internal successors, (453), 45 states have internal predecessors, (453), 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) [2024-11-19 01:50:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:22,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-19 01:50:22,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand