./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:51:38,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:51:38,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:51:38,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:51:38,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:51:38,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:51:38,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:51:38,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:51:38,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:51:38,948 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:51:38,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:51:38,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:51:38,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:51:38,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:51:38,949 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:51:38,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:51:38,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:51:38,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:51:38,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:51:38,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:51:38,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:51:38,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:51:38,952 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:51:38,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:51:38,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:51:38,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:51:38,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:51:38,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:51:38,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:51:38,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:51:38,956 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:51:38,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:51:38,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-22 13:51:39,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:51:39,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:51:39,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:51:39,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:51:39,192 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:51:39,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-22 13:51:40,456 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:51:40,660 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:51:40,661 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-22 13:51:40,668 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb75ba7f4/08fa8fbe6271467b9292514c950cd1fa/FLAG98444b4a1 [2024-11-22 13:51:41,032 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb75ba7f4/08fa8fbe6271467b9292514c950cd1fa [2024-11-22 13:51:41,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:51:41,035 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:51:41,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:51:41,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:51:41,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:51:41,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41, skipping insertion in model container [2024-11-22 13:51:41,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,060 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:51:41,255 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-22 13:51:41,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:51:41,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:51:41,280 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-22 13:51:41,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:51:41,293 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:51:41,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41 WrapperNode [2024-11-22 13:51:41,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:51:41,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:51:41,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:51:41,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:51:41,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,316 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-22 13:51:41,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:51:41,317 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:51:41,317 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:51:41,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:51:41,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,338 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-22 13:51:41,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:51:41,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:51:41,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:51:41,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:51:41,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (1/1) ... [2024-11-22 13:51:41,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:51:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:41,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:51:41,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:51:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:51:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:51:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:51:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:51:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:51:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:51:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 13:51:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 13:51:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:51:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:51:41,424 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:51:41,504 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:51:41,506 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:51:41,624 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:51:41,624 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:51:41,741 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:51:41,742 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 13:51:41,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:51:41 BoogieIcfgContainer [2024-11-22 13:51:41,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:51:41,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:51:41,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:51:41,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:51:41,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:51:41" (1/3) ... [2024-11-22 13:51:41,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510152e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:51:41, skipping insertion in model container [2024-11-22 13:51:41,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:41" (2/3) ... [2024-11-22 13:51:41,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510152e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:51:41, skipping insertion in model container [2024-11-22 13:51:41,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:51:41" (3/3) ... [2024-11-22 13:51:41,751 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-22 13:51:41,762 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:51:41,763 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:51:41,763 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:51:41,792 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:51:41,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-22 13:51:41,835 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-22 13:51:41,835 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:51:41,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-22 13:51:41,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-22 13:51:41,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-22 13:51:41,847 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:51:41,855 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;@41d98b31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:51:41,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:51:41,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:51:41,869 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-22 13:51:41,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:51:41,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:41,869 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:41,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:41,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-11-22 13:51:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770552473] [2024-11-22 13:51:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:51:41,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770552473] [2024-11-22 13:51:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770552473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:51:42,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:51:42,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:51:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017896742] [2024-11-22 13:51:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:51:42,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:51:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:51:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:51:42,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-22 13:51:42,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:42,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:42,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-22 13:51:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:42,351 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-11-22 13:51:42,351 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-22 13:51:42,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 410 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-11-22 13:51:42,354 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-22 13:51:42,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-11-22 13:51:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:51:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:51:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-22 13:51:42,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-22 13:51:42,366 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-11-22 13:51:42,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-11-22 13:51:42,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:51:42,369 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-11-22 13:51:42,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-11-22 13:51:42,374 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-11-22 13:51:42,374 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-11-22 13:51:42,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:42,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:42,375 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:42,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:51:42,375 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:42,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-11-22 13:51:42,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:42,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676158456] [2024-11-22 13:51:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:51:42,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:51:42,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676158456] [2024-11-22 13:51:42,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676158456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:51:42,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:51:42,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:51:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300544356] [2024-11-22 13:51:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:51:42,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:51:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:51:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:51:42,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:51:42,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:42,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:42,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:51:42,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:42,555 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-11-22 13:51:42,556 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 13:51:42,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-11-22 13:51:42,559 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-22 13:51:42,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-11-22 13:51:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:51:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:51:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-22 13:51:42,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-22 13:51:42,561 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-11-22 13:51:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-11-22 13:51:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:51:42,563 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-22 13:51:42,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-22 13:51:42,564 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-22 13:51:42,564 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-22 13:51:42,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:42,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:42,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:42,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:51:42,565 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:42,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-11-22 13:51:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:42,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552325427] [2024-11-22 13:51:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:51:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:42,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:42,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552325427] [2024-11-22 13:51:42,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552325427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:42,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627883935] [2024-11-22 13:51:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:51:42,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:42,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:42,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:51:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:42,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:51:42,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:43,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627883935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:43,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:43,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-22 13:51:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666393395] [2024-11-22 13:51:43,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:43,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:51:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:43,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:51:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:51:43,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:51:43,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:43,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:43,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:51:43,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:44,021 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-11-22 13:51:44,021 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-22 13:51:44,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4177 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-11-22 13:51:44,032 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-11-22 13:51:44,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-11-22 13:51:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 13:51:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 13:51:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-11-22 13:51:44,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-11-22 13:51:44,037 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-11-22 13:51:44,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-11-22 13:51:44,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 13:51:44,042 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-11-22 13:51:44,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-11-22 13:51:44,043 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-11-22 13:51:44,043 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-11-22 13:51:44,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:44,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:44,044 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:44,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:51:44,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:44,245 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:44,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -987841917, now seen corresponding path program 2 times [2024-11-22 13:51:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629790214] [2024-11-22 13:51:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:51:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:44,271 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:44,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:44,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629790214] [2024-11-22 13:51:44,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629790214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996025763] [2024-11-22 13:51:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:51:44,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:44,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:44,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:44,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:51:44,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:44,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:44,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 13:51:44,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:44,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996025763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:44,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8] total 14 [2024-11-22 13:51:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085371534] [2024-11-22 13:51:44,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:44,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:51:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:51:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:51:44,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:51:44,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:44,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:44,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:51:44,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:45,293 INFO L124 PetriNetUnfolderBase]: 814/1407 cut-off events. [2024-11-22 13:51:45,293 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2024-11-22 13:51:45,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1407 events. 814/1407 cut-off events. For 3056/3056 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6686 event pairs, 0 based on Foata normal form. 30/1437 useless extension candidates. Maximal degree in co-relation 4629. Up to 358 conditions per place. [2024-11-22 13:51:45,302 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 114 selfloop transitions, 145 changer transitions 15/275 dead transitions. [2024-11-22 13:51:45,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 275 transitions, 2256 flow [2024-11-22 13:51:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 13:51:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 13:51:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2024-11-22 13:51:45,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2024-11-22 13:51:45,304 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 19 states and 164 transitions. [2024-11-22 13:51:45,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 275 transitions, 2256 flow [2024-11-22 13:51:45,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 275 transitions, 2119 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-11-22 13:51:45,317 INFO L231 Difference]: Finished difference. Result has 83 places, 202 transitions, 1877 flow [2024-11-22 13:51:45,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1877, PETRI_PLACES=83, PETRI_TRANSITIONS=202} [2024-11-22 13:51:45,318 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 60 predicate places. [2024-11-22 13:51:45,318 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 202 transitions, 1877 flow [2024-11-22 13:51:45,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:45,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:45,319 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:45,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:51:45,522 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,SelfDestructingSolverStorable3 [2024-11-22 13:51:45,523 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:45,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:45,523 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 3 times [2024-11-22 13:51:45,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:45,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868923091] [2024-11-22 13:51:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:51:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:45,538 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:51:45,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:45,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:45,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868923091] [2024-11-22 13:51:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868923091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:45,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370068934] [2024-11-22 13:51:45,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:51:45,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:45,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:45,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:51:45,696 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:51:45,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:45,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:51:45,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:45,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370068934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:45,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-22 13:51:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766686676] [2024-11-22 13:51:45,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:45,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:51:45,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:51:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:51:45,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:51:45,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 202 transitions, 1877 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:45,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:45,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:51:45,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:46,394 INFO L124 PetriNetUnfolderBase]: 1072/1906 cut-off events. [2024-11-22 13:51:46,395 INFO L125 PetriNetUnfolderBase]: For 11722/11732 co-relation queries the response was YES. [2024-11-22 13:51:46,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1906 events. 1072/1906 cut-off events. For 11722/11732 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10311 event pairs, 102 based on Foata normal form. 18/1922 useless extension candidates. Maximal degree in co-relation 7811. Up to 602 conditions per place. [2024-11-22 13:51:46,407 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 132 selfloop transitions, 186 changer transitions 23/375 dead transitions. [2024-11-22 13:51:46,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 375 transitions, 4182 flow [2024-11-22 13:51:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:51:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:51:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-11-22 13:51:46,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-22 13:51:46,409 INFO L175 Difference]: Start difference. First operand has 83 places, 202 transitions, 1877 flow. Second operand 16 states and 156 transitions. [2024-11-22 13:51:46,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 375 transitions, 4182 flow [2024-11-22 13:51:46,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 375 transitions, 4095 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-22 13:51:46,446 INFO L231 Difference]: Finished difference. Result has 106 places, 304 transitions, 3747 flow [2024-11-22 13:51:46,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3747, PETRI_PLACES=106, PETRI_TRANSITIONS=304} [2024-11-22 13:51:46,447 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-11-22 13:51:46,447 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 304 transitions, 3747 flow [2024-11-22 13:51:46,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:46,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:46,448 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:46,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:51:46,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:46,649 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:46,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1733481921, now seen corresponding path program 4 times [2024-11-22 13:51:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380451482] [2024-11-22 13:51:46,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:51:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:46,659 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:51:46,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380451482] [2024-11-22 13:51:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380451482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546488000] [2024-11-22 13:51:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:51:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:46,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:46,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:51:46,847 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:51:46,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:46,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:51:46,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:46,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546488000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:47,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:47,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-11-22 13:51:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111210342] [2024-11-22 13:51:47,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:47,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:51:47,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:51:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:51:47,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:51:47,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 304 transitions, 3747 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:47,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:47,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:51:47,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:48,085 INFO L124 PetriNetUnfolderBase]: 1466/2461 cut-off events. [2024-11-22 13:51:48,086 INFO L125 PetriNetUnfolderBase]: For 23976/23976 co-relation queries the response was YES. [2024-11-22 13:51:48,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 2461 events. 1466/2461 cut-off events. For 23976/23976 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12825 event pairs, 16 based on Foata normal form. 35/2496 useless extension candidates. Maximal degree in co-relation 13611. Up to 533 conditions per place. [2024-11-22 13:51:48,107 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 207 selfloop transitions, 394 changer transitions 1/603 dead transitions. [2024-11-22 13:51:48,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 603 transitions, 8447 flow [2024-11-22 13:51:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:51:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:51:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2024-11-22 13:51:48,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2024-11-22 13:51:48,109 INFO L175 Difference]: Start difference. First operand has 106 places, 304 transitions, 3747 flow. Second operand 26 states and 229 transitions. [2024-11-22 13:51:48,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 603 transitions, 8447 flow [2024-11-22 13:51:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 603 transitions, 8219 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-11-22 13:51:48,238 INFO L231 Difference]: Finished difference. Result has 141 places, 491 transitions, 7451 flow [2024-11-22 13:51:48,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7451, PETRI_PLACES=141, PETRI_TRANSITIONS=491} [2024-11-22 13:51:48,239 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-11-22 13:51:48,239 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 491 transitions, 7451 flow [2024-11-22 13:51:48,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:48,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:48,240 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:48,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 13:51:48,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:48,444 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:48,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1329935501, now seen corresponding path program 5 times [2024-11-22 13:51:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802450731] [2024-11-22 13:51:48,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:51:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:48,455 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:48,455 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:48,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802450731] [2024-11-22 13:51:48,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802450731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463964631] [2024-11-22 13:51:48,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:51:48,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:48,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:48,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:48,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:51:48,639 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:48,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:48,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:51:48,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:48,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:48,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463964631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:48,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:48,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-11-22 13:51:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475454132] [2024-11-22 13:51:48,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:48,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 13:51:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 13:51:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-22 13:51:48,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:51:48,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 491 transitions, 7451 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:48,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:48,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:51:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:51,189 INFO L124 PetriNetUnfolderBase]: 1856/3255 cut-off events. [2024-11-22 13:51:51,193 INFO L125 PetriNetUnfolderBase]: For 49641/49677 co-relation queries the response was YES. [2024-11-22 13:51:51,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23084 conditions, 3255 events. 1856/3255 cut-off events. For 49641/49677 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19017 event pairs, 31 based on Foata normal form. 54/3307 useless extension candidates. Maximal degree in co-relation 21423. Up to 737 conditions per place. [2024-11-22 13:51:51,226 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 166 selfloop transitions, 680 changer transitions 2/888 dead transitions. [2024-11-22 13:51:51,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 888 transitions, 14439 flow [2024-11-22 13:51:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-22 13:51:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-22 13:51:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 379 transitions. [2024-11-22 13:51:51,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40105820105820106 [2024-11-22 13:51:51,228 INFO L175 Difference]: Start difference. First operand has 141 places, 491 transitions, 7451 flow. Second operand 45 states and 379 transitions. [2024-11-22 13:51:51,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 888 transitions, 14439 flow [2024-11-22 13:51:51,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 888 transitions, 13952 flow, removed 241 selfloop flow, removed 2 redundant places. [2024-11-22 13:51:51,454 INFO L231 Difference]: Finished difference. Result has 191 places, 784 transitions, 13448 flow [2024-11-22 13:51:51,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13448, PETRI_PLACES=191, PETRI_TRANSITIONS=784} [2024-11-22 13:51:51,455 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2024-11-22 13:51:51,455 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 784 transitions, 13448 flow [2024-11-22 13:51:51,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:51,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:51,456 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:51,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:51:51,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:51,657 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:51,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1352183953, now seen corresponding path program 6 times [2024-11-22 13:51:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:51,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37484064] [2024-11-22 13:51:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:51:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:51,667 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:51:51,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37484064] [2024-11-22 13:51:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37484064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717497098] [2024-11-22 13:51:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:51:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:51,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:51,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:51:51,849 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:51:51,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:51,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:51:51,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:51,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717497098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:52,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:52,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-22 13:51:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649029304] [2024-11-22 13:51:52,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:52,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:51:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:51:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:51:52,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:51:52,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 784 transitions, 13448 flow. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:52,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:52,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:51:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:53,952 INFO L124 PetriNetUnfolderBase]: 2279/3901 cut-off events. [2024-11-22 13:51:53,953 INFO L125 PetriNetUnfolderBase]: For 49771/49771 co-relation queries the response was YES. [2024-11-22 13:51:53,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29849 conditions, 3901 events. 2279/3901 cut-off events. For 49771/49771 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22842 event pairs, 24 based on Foata normal form. 6/3907 useless extension candidates. Maximal degree in co-relation 28455. Up to 873 conditions per place. [2024-11-22 13:51:53,986 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 346 selfloop transitions, 757 changer transitions 5/1109 dead transitions. [2024-11-22 13:51:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1109 transitions, 20310 flow [2024-11-22 13:51:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-22 13:51:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-22 13:51:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 343 transitions. [2024-11-22 13:51:53,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-22 13:51:53,992 INFO L175 Difference]: Start difference. First operand has 191 places, 784 transitions, 13448 flow. Second operand 40 states and 343 transitions. [2024-11-22 13:51:53,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1109 transitions, 20310 flow [2024-11-22 13:51:54,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1109 transitions, 19340 flow, removed 425 selfloop flow, removed 2 redundant places. [2024-11-22 13:51:54,467 INFO L231 Difference]: Finished difference. Result has 242 places, 1010 transitions, 19200 flow [2024-11-22 13:51:54,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19200, PETRI_PLACES=242, PETRI_TRANSITIONS=1010} [2024-11-22 13:51:54,468 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 219 predicate places. [2024-11-22 13:51:54,468 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 1010 transitions, 19200 flow [2024-11-22 13:51:54,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:54,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:54,469 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:54,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 13:51:54,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:54,674 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:54,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 7 times [2024-11-22 13:51:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304713931] [2024-11-22 13:51:54,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:51:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:54,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304713931] [2024-11-22 13:51:54,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304713931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:54,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886167105] [2024-11-22 13:51:54,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:51:54,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:54,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:54,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:51:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:51:54,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:51:54,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:54,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886167105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:55,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-22 13:51:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775170726] [2024-11-22 13:51:55,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:55,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:51:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:51:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:51:55,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:51:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1010 transitions, 19200 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:55,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:55,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:51:55,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:51:56,776 INFO L124 PetriNetUnfolderBase]: 2494/4333 cut-off events. [2024-11-22 13:51:56,777 INFO L125 PetriNetUnfolderBase]: For 60200/60204 co-relation queries the response was YES. [2024-11-22 13:51:56,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36667 conditions, 4333 events. 2494/4333 cut-off events. For 60200/60204 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26967 event pairs, 119 based on Foata normal form. 22/4355 useless extension candidates. Maximal degree in co-relation 35768. Up to 994 conditions per place. [2024-11-22 13:51:56,819 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 347 selfloop transitions, 789 changer transitions 5/1213 dead transitions. [2024-11-22 13:51:56,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1213 transitions, 25110 flow [2024-11-22 13:51:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:51:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:51:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 202 transitions. [2024-11-22 13:51:56,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4580498866213152 [2024-11-22 13:51:56,824 INFO L175 Difference]: Start difference. First operand has 242 places, 1010 transitions, 19200 flow. Second operand 21 states and 202 transitions. [2024-11-22 13:51:56,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1213 transitions, 25110 flow [2024-11-22 13:51:57,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1213 transitions, 24789 flow, removed 149 selfloop flow, removed 5 redundant places. [2024-11-22 13:51:57,590 INFO L231 Difference]: Finished difference. Result has 264 places, 1153 transitions, 24423 flow [2024-11-22 13:51:57,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=18832, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24423, PETRI_PLACES=264, PETRI_TRANSITIONS=1153} [2024-11-22 13:51:57,592 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 241 predicate places. [2024-11-22 13:51:57,592 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 1153 transitions, 24423 flow [2024-11-22 13:51:57,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:57,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:51:57,592 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:51:57,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 13:51:57,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:57,794 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:51:57,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:51:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2110190859, now seen corresponding path program 8 times [2024-11-22 13:51:57,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:51:57,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135767038] [2024-11-22 13:51:57,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:51:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:51:57,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:57,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:51:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135767038] [2024-11-22 13:51:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135767038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:51:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821333059] [2024-11-22 13:51:58,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:51:58,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:51:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:51:58,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:51:58,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:51:58,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:51:58,086 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:51:58,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:51:58,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:51:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:58,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:51:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:51:58,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821333059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:51:58,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:51:58,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-22 13:51:58,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471299422] [2024-11-22 13:51:58,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:51:58,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:51:58,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:51:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:51:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:51:58,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:51:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1153 transitions, 24423 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:51:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:51:58,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:51:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:00,367 INFO L124 PetriNetUnfolderBase]: 2960/5160 cut-off events. [2024-11-22 13:52:00,368 INFO L125 PetriNetUnfolderBase]: For 90750/90786 co-relation queries the response was YES. [2024-11-22 13:52:00,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47710 conditions, 5160 events. 2960/5160 cut-off events. For 90750/90786 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33170 event pairs, 129 based on Foata normal form. 50/5210 useless extension candidates. Maximal degree in co-relation 47079. Up to 1121 conditions per place. [2024-11-22 13:52:00,452 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 333 selfloop transitions, 1055 changer transitions 0/1460 dead transitions. [2024-11-22 13:52:00,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1460 transitions, 33376 flow [2024-11-22 13:52:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 13:52:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-22 13:52:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-11-22 13:52:00,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-22 13:52:00,453 INFO L175 Difference]: Start difference. First operand has 264 places, 1153 transitions, 24423 flow. Second operand 23 states and 230 transitions. [2024-11-22 13:52:00,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1460 transitions, 33376 flow [2024-11-22 13:52:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1460 transitions, 33219 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-11-22 13:52:01,668 INFO L231 Difference]: Finished difference. Result has 292 places, 1386 transitions, 33936 flow [2024-11-22 13:52:01,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24199, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=33936, PETRI_PLACES=292, PETRI_TRANSITIONS=1386} [2024-11-22 13:52:01,670 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2024-11-22 13:52:01,670 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 1386 transitions, 33936 flow [2024-11-22 13:52:01,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:01,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:01,670 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:01,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:01,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 13:52:01,871 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:01,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 233897117, now seen corresponding path program 9 times [2024-11-22 13:52:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203059436] [2024-11-22 13:52:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:01,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:52:01,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203059436] [2024-11-22 13:52:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203059436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790545578] [2024-11-22 13:52:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:01,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:01,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:01,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:52:02,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:52:02,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:02,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:52:02,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:02,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:02,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790545578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:02,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:02,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-22 13:52:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397681189] [2024-11-22 13:52:02,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:02,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:52:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:52:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:52:02,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:52:02,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1386 transitions, 33936 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:02,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:02,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:52:02,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:04,373 INFO L124 PetriNetUnfolderBase]: 2958/5132 cut-off events. [2024-11-22 13:52:04,374 INFO L125 PetriNetUnfolderBase]: For 122590/122628 co-relation queries the response was YES. [2024-11-22 13:52:04,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53208 conditions, 5132 events. 2958/5132 cut-off events. For 122590/122628 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32832 event pairs, 211 based on Foata normal form. 16/5148 useless extension candidates. Maximal degree in co-relation 52584. Up to 1456 conditions per place. [2024-11-22 13:52:04,444 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 274 selfloop transitions, 1091 changer transitions 4/1441 dead transitions. [2024-11-22 13:52:04,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1441 transitions, 37325 flow [2024-11-22 13:52:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 13:52:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 13:52:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 192 transitions. [2024-11-22 13:52:04,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-22 13:52:04,446 INFO L175 Difference]: Start difference. First operand has 292 places, 1386 transitions, 33936 flow. Second operand 20 states and 192 transitions. [2024-11-22 13:52:04,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1441 transitions, 37325 flow [2024-11-22 13:52:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1441 transitions, 37101 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-11-22 13:52:06,192 INFO L231 Difference]: Finished difference. Result has 309 places, 1398 transitions, 36979 flow [2024-11-22 13:52:06,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=33627, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=36979, PETRI_PLACES=309, PETRI_TRANSITIONS=1398} [2024-11-22 13:52:06,194 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 286 predicate places. [2024-11-22 13:52:06,194 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 1398 transitions, 36979 flow [2024-11-22 13:52:06,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:06,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:06,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:06,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 13:52:06,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:06,398 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:06,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 363728341, now seen corresponding path program 10 times [2024-11-22 13:52:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:06,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057359884] [2024-11-22 13:52:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:06,410 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:06,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:06,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057359884] [2024-11-22 13:52:06,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057359884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:06,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241159775] [2024-11-22 13:52:06,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:06,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:06,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:52:06,571 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:06,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:06,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:52:06,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:06,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:06,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241159775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:06,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:06,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-22 13:52:06,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073335111] [2024-11-22 13:52:06,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:06,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 13:52:06,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 13:52:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-22 13:52:06,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:06,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1398 transitions, 36979 flow. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:06,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:06,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:06,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:10,534 INFO L124 PetriNetUnfolderBase]: 4611/7745 cut-off events. [2024-11-22 13:52:10,534 INFO L125 PetriNetUnfolderBase]: For 189094/189094 co-relation queries the response was YES. [2024-11-22 13:52:10,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86372 conditions, 7745 events. 4611/7745 cut-off events. For 189094/189094 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 49995 event pairs, 55 based on Foata normal form. 135/7880 useless extension candidates. Maximal degree in co-relation 86004. Up to 1757 conditions per place. [2024-11-22 13:52:10,619 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 703 selfloop transitions, 1611 changer transitions 6/2321 dead transitions. [2024-11-22 13:52:10,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 2321 transitions, 65045 flow [2024-11-22 13:52:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-22 13:52:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-22 13:52:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-22 13:52:10,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-11-22 13:52:10,621 INFO L175 Difference]: Start difference. First operand has 309 places, 1398 transitions, 36979 flow. Second operand 47 states and 403 transitions. [2024-11-22 13:52:10,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 2321 transitions, 65045 flow [2024-11-22 13:52:14,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2321 transitions, 64325 flow, removed 95 selfloop flow, removed 15 redundant places. [2024-11-22 13:52:14,284 INFO L231 Difference]: Finished difference. Result has 368 places, 2114 transitions, 62918 flow [2024-11-22 13:52:14,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=36061, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=62918, PETRI_PLACES=368, PETRI_TRANSITIONS=2114} [2024-11-22 13:52:14,288 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 345 predicate places. [2024-11-22 13:52:14,288 INFO L471 AbstractCegarLoop]: Abstraction has has 368 places, 2114 transitions, 62918 flow [2024-11-22 13:52:14,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:14,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:14,288 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:14,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:14,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 13:52:14,493 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:14,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1253793071, now seen corresponding path program 11 times [2024-11-22 13:52:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412692608] [2024-11-22 13:52:14,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:14,504 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:14,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412692608] [2024-11-22 13:52:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412692608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113216528] [2024-11-22 13:52:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:14,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:14,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:52:14,715 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:14,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:14,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:52:14,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:14,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113216528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:15,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:15,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-11-22 13:52:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492994998] [2024-11-22 13:52:15,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:15,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:52:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:15,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:52:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:52:15,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:52:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 2114 transitions, 62918 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:52:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:21,725 INFO L124 PetriNetUnfolderBase]: 6669/11409 cut-off events. [2024-11-22 13:52:21,725 INFO L125 PetriNetUnfolderBase]: For 381081/381123 co-relation queries the response was YES. [2024-11-22 13:52:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145414 conditions, 11409 events. 6669/11409 cut-off events. For 381081/381123 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 80035 event pairs, 115 based on Foata normal form. 133/11542 useless extension candidates. Maximal degree in co-relation 143714. Up to 2889 conditions per place. [2024-11-22 13:52:21,867 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 313 selfloop transitions, 2926 changer transitions 0/3365 dead transitions. [2024-11-22 13:52:21,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 3365 transitions, 108182 flow [2024-11-22 13:52:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 13:52:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-22 13:52:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 317 transitions. [2024-11-22 13:52:21,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4312925170068027 [2024-11-22 13:52:21,868 INFO L175 Difference]: Start difference. First operand has 368 places, 2114 transitions, 62918 flow. Second operand 35 states and 317 transitions. [2024-11-22 13:52:21,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 3365 transitions, 108182 flow [2024-11-22 13:52:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 3365 transitions, 107385 flow, removed 389 selfloop flow, removed 4 redundant places. [2024-11-22 13:52:30,413 INFO L231 Difference]: Finished difference. Result has 402 places, 3220 transitions, 105783 flow [2024-11-22 13:52:30,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=62326, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=105783, PETRI_PLACES=402, PETRI_TRANSITIONS=3220} [2024-11-22 13:52:30,415 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 379 predicate places. [2024-11-22 13:52:30,416 INFO L471 AbstractCegarLoop]: Abstraction has has 402 places, 3220 transitions, 105783 flow [2024-11-22 13:52:30,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:30,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:30,416 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:30,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 13:52:30,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:52:30,617 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:30,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1843114293, now seen corresponding path program 12 times [2024-11-22 13:52:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754350041] [2024-11-22 13:52:30,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:52:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:30,624 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:52:30,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754350041] [2024-11-22 13:52:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754350041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120433484] [2024-11-22 13:52:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:52:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:30,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:30,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:52:30,774 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:52:30,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:30,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:52:30,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:30,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120433484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:30,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:30,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-22 13:52:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541000730] [2024-11-22 13:52:30,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:30,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:52:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:52:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:52:30,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:52:30,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 3220 transitions, 105783 flow. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:30,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:30,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:52:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:32,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-22 13:52:46,929 INFO L124 PetriNetUnfolderBase]: 8617/14660 cut-off events. [2024-11-22 13:52:46,929 INFO L125 PetriNetUnfolderBase]: For 545228/545311 co-relation queries the response was YES. [2024-11-22 13:52:47,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200379 conditions, 14660 events. 8617/14660 cut-off events. For 545228/545311 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 107005 event pairs, 636 based on Foata normal form. 74/14733 useless extension candidates. Maximal degree in co-relation 198224. Up to 4877 conditions per place. [2024-11-22 13:52:47,148 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1324 selfloop transitions, 2826 changer transitions 0/4276 dead transitions. [2024-11-22 13:52:47,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 4276 transitions, 149555 flow [2024-11-22 13:52:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 13:52:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 13:52:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 259 transitions. [2024-11-22 13:52:47,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-11-22 13:52:47,150 INFO L175 Difference]: Start difference. First operand has 402 places, 3220 transitions, 105783 flow. Second operand 27 states and 259 transitions. [2024-11-22 13:52:47,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 4276 transitions, 149555 flow [2024-11-22 13:53:04,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 4276 transitions, 147412 flow, removed 216 selfloop flow, removed 3 redundant places. [2024-11-22 13:53:05,048 INFO L231 Difference]: Finished difference. Result has 443 places, 4187 transitions, 149255 flow [2024-11-22 13:53:05,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=104087, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1953, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=149255, PETRI_PLACES=443, PETRI_TRANSITIONS=4187} [2024-11-22 13:53:05,052 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 420 predicate places. [2024-11-22 13:53:05,052 INFO L471 AbstractCegarLoop]: Abstraction has has 443 places, 4187 transitions, 149255 flow [2024-11-22 13:53:05,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:05,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:05,052 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:05,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 13:53:05,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:53:05,253 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:05,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:05,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1067909569, now seen corresponding path program 13 times [2024-11-22 13:53:05,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:05,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928975916] [2024-11-22 13:53:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928975916] [2024-11-22 13:53:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928975916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051321242] [2024-11-22 13:53:05,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:05,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:05,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:05,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:53:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:05,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:53:05,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:05,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051321242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:05,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:05,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-22 13:53:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578775795] [2024-11-22 13:53:05,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:05,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:53:05,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:53:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:53:05,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-22 13:53:05,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 4187 transitions, 149255 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:05,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:05,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-22 13:53:05,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand