./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i -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 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:10:22,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:10:22,621 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:10:22,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:10:22,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:10:22,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:10:22,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:10:22,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:10:22,670 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:10:22,671 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:10:22,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:10:22,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:10:22,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:10:22,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:10:22,675 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:10:22,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:10:22,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:10:22,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:10:22,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:10:22,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:10:22,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:10:22,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:10:22,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:10:22,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:10:22,681 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:10:22,682 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:10:22,682 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:10:22,682 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:10:22,682 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:10:22,683 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:10:22,683 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:10:22,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:10:22,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:10:22,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:10:22,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:10:22,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:10:22,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:10:22,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:10:22,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:10:22,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:10:22,685 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:10:22,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:10:22,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2024-10-24 12:10:22,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:10:22,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:10:23,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:10:23,001 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:10:23,002 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:10:23,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-10-24 12:10:24,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:10:25,096 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:10:25,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-10-24 12:10:25,121 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6dda6b4f/c904069c186e4c5fa118915ff2233309/FLAG2b55c1834 [2024-10-24 12:10:25,367 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6dda6b4f/c904069c186e4c5fa118915ff2233309 [2024-10-24 12:10:25,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:10:25,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:10:25,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:10:25,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:10:25,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:10:25,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:25" (1/1) ... [2024-10-24 12:10:25,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600151d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:25, skipping insertion in model container [2024-10-24 12:10:25,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:25" (1/1) ... [2024-10-24 12:10:25,426 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:10:25,842 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30746,30759] [2024-10-24 12:10:25,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:10:25,909 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:10:25,987 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30746,30759] [2024-10-24 12:10:25,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:10:26,050 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:10:26,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26 WrapperNode [2024-10-24 12:10:26,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:10:26,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:10:26,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:10:26,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:10:26,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,101 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2024-10-24 12:10:26,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:10:26,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:10:26,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:10:26,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:10:26,113 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,132 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-24 12:10:26,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:10:26,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:10:26,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:10:26,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:10:26,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (1/1) ... [2024-10-24 12:10:26,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:10:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:26,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:10:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:10:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-24 12:10:26,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:10:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 12:10:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:10:26,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:10:26,319 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:10:26,511 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:10:26,514 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:10:26,753 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:10:26,757 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:10:26,891 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:10:26,891 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 12:10:26,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:26 BoogieIcfgContainer [2024-10-24 12:10:26,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:10:26,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:10:26,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:10:26,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:10:26,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:10:25" (1/3) ... [2024-10-24 12:10:26,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240c29b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:26, skipping insertion in model container [2024-10-24 12:10:26,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:26" (2/3) ... [2024-10-24 12:10:26,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240c29b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:26, skipping insertion in model container [2024-10-24 12:10:26,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:26" (3/3) ... [2024-10-24 12:10:26,901 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-10-24 12:10:26,918 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:10:26,918 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:10:26,919 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:10:26,971 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:10:27,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 23 transitions, 50 flow [2024-10-24 12:10:27,035 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-10-24 12:10:27,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:10:27,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-24 12:10:27,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 23 transitions, 50 flow [2024-10-24 12:10:27,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 23 transitions, 50 flow [2024-10-24 12:10:27,058 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:10:27,071 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;@5b536040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:10:27,072 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:10:27,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:10:27,084 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-10-24 12:10:27,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:10:27,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:27,085 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 12:10:27,086 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:10:27,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash -531527673, now seen corresponding path program 1 times [2024-10-24 12:10:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:27,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738337187] [2024-10-24 12:10:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738337187] [2024-10-24 12:10:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738337187] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:10:27,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:10:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:10:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085051252] [2024-10-24 12:10:27,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:10:27,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:10:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:10:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:10:27,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-24 12:10:27,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-24 12:10:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:27,533 INFO L124 PetriNetUnfolderBase]: 20/67 cut-off events. [2024-10-24 12:10:27,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:10:27,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 67 events. 20/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 3/63 useless extension candidates. Maximal degree in co-relation 105. Up to 51 conditions per place. [2024-10-24 12:10:27,539 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-10-24 12:10:27,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 80 flow [2024-10-24 12:10:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:10:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:10:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-10-24 12:10:27,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-10-24 12:10:27,557 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-10-24 12:10:27,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 80 flow [2024-10-24 12:10:27,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:10:27,564 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-10-24 12:10:27,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-10-24 12:10:27,576 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-24 12:10:27,576 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-10-24 12:10:27,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:27,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:27,577 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:27,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:10:27,577 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:10:27,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash 211174233, now seen corresponding path program 1 times [2024-10-24 12:10:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676571169] [2024-10-24 12:10:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:27,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676571169] [2024-10-24 12:10:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676571169] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62057105] [2024-10-24 12:10:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:27,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:27,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:27,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:10:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:27,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:10:27,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:27,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62057105] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:27,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:10:27,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744682269] [2024-10-24 12:10:27,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:27,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:10:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:10:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:10:27,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-24 12:10:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-24 12:10:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:27,931 INFO L124 PetriNetUnfolderBase]: 20/70 cut-off events. [2024-10-24 12:10:27,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:10:27,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 70 events. 20/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 127. Up to 51 conditions per place. [2024-10-24 12:10:27,933 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2024-10-24 12:10:27,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 108 flow [2024-10-24 12:10:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:10:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:10:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-10-24 12:10:27,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-10-24 12:10:27,935 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 6 states and 58 transitions. [2024-10-24 12:10:27,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 108 flow [2024-10-24 12:10:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:27,937 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 90 flow [2024-10-24 12:10:27,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-10-24 12:10:27,942 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2024-10-24 12:10:27,942 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 90 flow [2024-10-24 12:10:27,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:27,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:27,943 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-24 12:10:27,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:10:28,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:28,145 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:10:28,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash 693030023, now seen corresponding path program 2 times [2024-10-24 12:10:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:28,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041304243] [2024-10-24 12:10:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041304243] [2024-10-24 12:10:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041304243] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505900393] [2024-10-24 12:10:28,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:10:28,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:28,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:28,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:10:28,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:10:28,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:10:28,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:10:28,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:28,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:10:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505900393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:28,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:28,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-24 12:10:28,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739743242] [2024-10-24 12:10:28,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:28,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:10:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:10:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:10:28,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-24 12:10:28,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:28,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:28,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-24 12:10:28,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:28,754 INFO L124 PetriNetUnfolderBase]: 20/72 cut-off events. [2024-10-24 12:10:28,754 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 12:10:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 72 events. 20/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 118. Up to 51 conditions per place. [2024-10-24 12:10:28,759 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2024-10-24 12:10:28,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 144 flow [2024-10-24 12:10:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:10:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:10:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-10-24 12:10:28,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3858695652173913 [2024-10-24 12:10:28,761 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 90 flow. Second operand 8 states and 71 transitions. [2024-10-24 12:10:28,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 144 flow [2024-10-24 12:10:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 130 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:28,766 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 112 flow [2024-10-24 12:10:28,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2024-10-24 12:10:28,768 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 17 predicate places. [2024-10-24 12:10:28,768 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 112 flow [2024-10-24 12:10:28,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:28,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:28,769 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-24 12:10:28,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:10:28,970 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,SelfDestructingSolverStorable2 [2024-10-24 12:10:28,971 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:10:28,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1739003591, now seen corresponding path program 3 times [2024-10-24 12:10:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234632853] [2024-10-24 12:10:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:29,004 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:10:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:29,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:10:29,052 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:10:29,053 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-24 12:10:29,058 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-24 12:10:29,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-24 12:10:29,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:10:29,097 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-24 12:10:29,104 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:10:29,104 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 12:10:29,137 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:10:29,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 39 transitions, 88 flow [2024-10-24 12:10:29,156 INFO L124 PetriNetUnfolderBase]: 5/44 cut-off events. [2024-10-24 12:10:29,158 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:10:29,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 5/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-10-24 12:10:29,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 39 transitions, 88 flow [2024-10-24 12:10:29,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 39 transitions, 88 flow [2024-10-24 12:10:29,162 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:10:29,165 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;@5b536040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:10:29,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 12:10:29,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:10:29,174 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-10-24 12:10:29,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:10:29,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:29,175 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-10-24 12:10:29,175 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-24 12:10:29,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1043353845, now seen corresponding path program 1 times [2024-10-24 12:10:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227591430] [2024-10-24 12:10:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:29,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227591430] [2024-10-24 12:10:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227591430] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:10:29,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:10:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:10:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313608072] [2024-10-24 12:10:29,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:10:29,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:10:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:10:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:10:29,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-24 12:10:29,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:29,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:29,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-24 12:10:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:29,460 INFO L124 PetriNetUnfolderBase]: 434/922 cut-off events. [2024-10-24 12:10:29,460 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-24 12:10:29,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 922 events. 434/922 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 51/864 useless extension candidates. Maximal degree in co-relation 1014. Up to 708 conditions per place. [2024-10-24 12:10:29,475 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-24 12:10:29,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 136 flow [2024-10-24 12:10:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:10:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:10:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-10-24 12:10:29,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-10-24 12:10:29,477 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 88 flow. Second operand 3 states and 63 transitions. [2024-10-24 12:10:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 136 flow [2024-10-24 12:10:29,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:10:29,479 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 94 flow [2024-10-24 12:10:29,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-24 12:10:29,482 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-10-24 12:10:29,483 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 94 flow [2024-10-24 12:10:29,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:29,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:29,484 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:29,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:10:29,484 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-24 12:10:29,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2137667530, now seen corresponding path program 1 times [2024-10-24 12:10:29,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:29,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399273581] [2024-10-24 12:10:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:29,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399273581] [2024-10-24 12:10:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399273581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81114241] [2024-10-24 12:10:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:29,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:29,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:10:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:29,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:10:29,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:29,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:29,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81114241] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:29,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:29,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:10:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102938651] [2024-10-24 12:10:29,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:29,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:10:29,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:29,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:10:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:10:29,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-24 12:10:29,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:29,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-24 12:10:29,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:30,074 INFO L124 PetriNetUnfolderBase]: 434/925 cut-off events. [2024-10-24 12:10:30,078 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-24 12:10:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 925 events. 434/925 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1666. Up to 708 conditions per place. [2024-10-24 12:10:30,092 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-10-24 12:10:30,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 164 flow [2024-10-24 12:10:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:10:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:10:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-10-24 12:10:30,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-10-24 12:10:30,101 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 94 flow. Second operand 6 states and 98 transitions. [2024-10-24 12:10:30,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 164 flow [2024-10-24 12:10:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 160 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:30,103 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 126 flow [2024-10-24 12:10:30,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-10-24 12:10:30,104 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2024-10-24 12:10:30,107 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 126 flow [2024-10-24 12:10:30,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:30,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:30,108 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-24 12:10:30,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 12:10:30,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:30,313 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-24 12:10:30,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:30,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1327636939, now seen corresponding path program 2 times [2024-10-24 12:10:30,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:30,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124567389] [2024-10-24 12:10:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:30,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:30,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124567389] [2024-10-24 12:10:30,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124567389] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111232285] [2024-10-24 12:10:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:10:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:30,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:30,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:10:30,540 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:10:30,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:10:30,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:10:30,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:30,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:10:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111232285] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:30,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:30,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-24 12:10:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781726197] [2024-10-24 12:10:30,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:30,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:10:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:10:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:10:30,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-24 12:10:30,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:30,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:30,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-24 12:10:30,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:30,767 INFO L124 PetriNetUnfolderBase]: 434/927 cut-off events. [2024-10-24 12:10:30,768 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-24 12:10:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 927 events. 434/927 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4768 event pairs, 376 based on Foata normal form. 2/821 useless extension candidates. Maximal degree in co-relation 1657. Up to 708 conditions per place. [2024-10-24 12:10:30,776 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-10-24 12:10:30,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 200 flow [2024-10-24 12:10:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:10:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:10:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-10-24 12:10:30,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2024-10-24 12:10:30,778 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 126 flow. Second operand 8 states and 121 transitions. [2024-10-24 12:10:30,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 200 flow [2024-10-24 12:10:30,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 186 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:30,781 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 148 flow [2024-10-24 12:10:30,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=148, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-10-24 12:10:30,782 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2024-10-24 12:10:30,782 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 148 flow [2024-10-24 12:10:30,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:30,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:30,783 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-24 12:10:30,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:10:30,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:30,984 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-24 12:10:30,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash -487823147, now seen corresponding path program 3 times [2024-10-24 12:10:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335695616] [2024-10-24 12:10:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:31,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:10:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:31,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:10:31,026 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:10:31,027 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-24 12:10:31,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-24 12:10:31,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-24 12:10:31,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-24 12:10:31,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 12:10:31,027 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-24 12:10:31,028 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:10:31,028 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 12:10:31,057 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:10:31,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 55 transitions, 128 flow [2024-10-24 12:10:31,065 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2024-10-24 12:10:31,066 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 12:10:31,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 63 events. 7/63 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-10-24 12:10:31,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 55 transitions, 128 flow [2024-10-24 12:10:31,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 55 transitions, 128 flow [2024-10-24 12:10:31,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:10:31,069 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;@5b536040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:10:31,069 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-24 12:10:31,073 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:10:31,073 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-10-24 12:10:31,074 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 12:10:31,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:31,074 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:31,074 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-24 12:10:31,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1422539676, now seen corresponding path program 1 times [2024-10-24 12:10:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:31,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080721403] [2024-10-24 12:10:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:31,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080721403] [2024-10-24 12:10:31,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080721403] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:10:31,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:10:31,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:10:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695351560] [2024-10-24 12:10:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:10:31,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:10:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:10:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:10:31,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-24 12:10:31,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:31,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:31,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-24 12:10:31,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:32,240 INFO L124 PetriNetUnfolderBase]: 6347/10809 cut-off events. [2024-10-24 12:10:32,241 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-10-24 12:10:32,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 10809 events. 6347/10809 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74953 event pairs, 5560 based on Foata normal form. 713/10235 useless extension candidates. Maximal degree in co-relation 1663. Up to 8808 conditions per place. [2024-10-24 12:10:32,330 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 34 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-24 12:10:32,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 194 flow [2024-10-24 12:10:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:10:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:10:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-24 12:10:32,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-10-24 12:10:32,332 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 89 transitions. [2024-10-24 12:10:32,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 194 flow [2024-10-24 12:10:32,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 192 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-24 12:10:32,335 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 130 flow [2024-10-24 12:10:32,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-10-24 12:10:32,336 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-10-24 12:10:32,336 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 130 flow [2024-10-24 12:10:32,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:32,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:32,337 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:32,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 12:10:32,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-24 12:10:32,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1561247080, now seen corresponding path program 1 times [2024-10-24 12:10:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:32,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887625840] [2024-10-24 12:10:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:32,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:32,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:32,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887625840] [2024-10-24 12:10:32,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887625840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398748155] [2024-10-24 12:10:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:32,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:32,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:32,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:10:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:32,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:10:32,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:32,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398748155] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:32,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:10:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394651955] [2024-10-24 12:10:32,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:32,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:10:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:10:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:10:32,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-24 12:10:32,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:32,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:32,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-24 12:10:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:33,615 INFO L124 PetriNetUnfolderBase]: 6347/10812 cut-off events. [2024-10-24 12:10:33,615 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-10-24 12:10:33,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19910 conditions, 10812 events. 6347/10812 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74912 event pairs, 5560 based on Foata normal form. 0/9525 useless extension candidates. Maximal degree in co-relation 19896. Up to 8808 conditions per place. [2024-10-24 12:10:33,794 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-10-24 12:10:33,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 220 flow [2024-10-24 12:10:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:10:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:10:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-10-24 12:10:33,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-10-24 12:10:33,796 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 130 flow. Second operand 6 states and 138 transitions. [2024-10-24 12:10:33,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 220 flow [2024-10-24 12:10:33,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:33,800 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 162 flow [2024-10-24 12:10:33,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-10-24 12:10:33,800 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-10-24 12:10:33,801 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 162 flow [2024-10-24 12:10:33,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:33,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:33,801 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:33,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:10:34,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 12:10:34,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-24 12:10:34,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2101195108, now seen corresponding path program 2 times [2024-10-24 12:10:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:34,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7963902] [2024-10-24 12:10:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:34,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:34,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7963902] [2024-10-24 12:10:34,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7963902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833258270] [2024-10-24 12:10:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:10:34,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:34,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:10:34,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:10:34,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:10:34,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:10:34,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:34,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:10:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833258270] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:34,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-24 12:10:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997261337] [2024-10-24 12:10:34,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:34,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:10:34,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:10:34,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:10:34,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-24 12:10:34,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:34,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:34,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-24 12:10:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:35,349 INFO L124 PetriNetUnfolderBase]: 6347/10814 cut-off events. [2024-10-24 12:10:35,349 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-10-24 12:10:35,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 10814 events. 6347/10814 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74893 event pairs, 5560 based on Foata normal form. 2/9530 useless extension candidates. Maximal degree in co-relation 19887. Up to 8808 conditions per place. [2024-10-24 12:10:35,431 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-10-24 12:10:35,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 256 flow [2024-10-24 12:10:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:10:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:10:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-10-24 12:10:35,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-10-24 12:10:35,433 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 162 flow. Second operand 8 states and 171 transitions. [2024-10-24 12:10:35,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 256 flow [2024-10-24 12:10:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 57 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 12:10:35,439 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 184 flow [2024-10-24 12:10:35,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-10-24 12:10:35,441 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-10-24 12:10:35,441 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 184 flow [2024-10-24 12:10:35,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:35,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:35,441 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:35,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 12:10:35,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:35,645 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-24 12:10:35,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash 308688868, now seen corresponding path program 3 times [2024-10-24 12:10:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:35,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699389617] [2024-10-24 12:10:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:35,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:10:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:10:35,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:10:35,710 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:10:35,710 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-24 12:10:35,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-24 12:10:35,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-24 12:10:35,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-24 12:10:35,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-24 12:10:35,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 12:10:35,711 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-24 12:10:35,712 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:10:35,712 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 12:10:35,755 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:10:35,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 170 flow [2024-10-24 12:10:35,768 INFO L124 PetriNetUnfolderBase]: 9/82 cut-off events. [2024-10-24 12:10:35,768 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 12:10:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 82 events. 9/82 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 211 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2024-10-24 12:10:35,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 71 transitions, 170 flow [2024-10-24 12:10:35,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 71 transitions, 170 flow [2024-10-24 12:10:35,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:10:35,771 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;@5b536040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:10:35,772 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-24 12:10:35,777 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:10:35,778 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-10-24 12:10:35,778 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-24 12:10:35,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:35,779 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:35,779 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-24 12:10:35,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1001218811, now seen corresponding path program 1 times [2024-10-24 12:10:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:35,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482689433] [2024-10-24 12:10:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:10:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482689433] [2024-10-24 12:10:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482689433] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:10:35,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:10:35,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:10:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592796138] [2024-10-24 12:10:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:10:35,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:10:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:10:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:10:35,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-24 12:10:35,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:35,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:35,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-24 12:10:35,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:10:47,134 INFO L124 PetriNetUnfolderBase]: 79247/119475 cut-off events. [2024-10-24 12:10:47,138 INFO L125 PetriNetUnfolderBase]: For 9589/9589 co-relation queries the response was YES. [2024-10-24 12:10:47,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224870 conditions, 119475 events. 79247/119475 cut-off events. For 9589/9589 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957964 event pairs, 69712 based on Foata normal form. 8858/114257 useless extension candidates. Maximal degree in co-relation 20055. Up to 101391 conditions per place. [2024-10-24 12:10:48,110 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-10-24 12:10:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 254 flow [2024-10-24 12:10:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:10:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:10:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-10-24 12:10:48,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.539906103286385 [2024-10-24 12:10:48,113 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 170 flow. Second operand 3 states and 115 transitions. [2024-10-24 12:10:48,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 254 flow [2024-10-24 12:10:48,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 248 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-24 12:10:48,123 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 166 flow [2024-10-24 12:10:48,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-10-24 12:10:48,124 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-24 12:10:48,125 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 166 flow [2024-10-24 12:10:48,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:48,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:10:48,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:10:48,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 12:10:48,125 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-24 12:10:48,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:10:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 658252622, now seen corresponding path program 1 times [2024-10-24 12:10:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:10:48,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946433573] [2024-10-24 12:10:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:10:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:10:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:10:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946433573] [2024-10-24 12:10:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946433573] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:10:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043986141] [2024-10-24 12:10:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:10:48,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:10:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:10:48,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:10:48,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:10:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:10:48,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:10:48,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:10:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:10:48,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:10:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:10:48,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043986141] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:10:48,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:10:48,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:10:48,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993931302] [2024-10-24 12:10:48,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:10:48,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:10:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:10:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:10:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:10:48,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-24 12:10:48,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:10:48,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:10:48,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-24 12:10:48,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:11:01,435 INFO L124 PetriNetUnfolderBase]: 79247/119478 cut-off events. [2024-10-24 12:11:01,436 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2024-10-24 12:11:01,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223347 conditions, 119478 events. 79247/119478 cut-off events. For 4319/4319 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957923 event pairs, 69712 based on Foata normal form. 0/105402 useless extension candidates. Maximal degree in co-relation 223332. Up to 101391 conditions per place. [2024-10-24 12:11:02,605 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 44 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-10-24 12:11:02,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 276 flow [2024-10-24 12:11:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:11:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:11:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-10-24 12:11:02,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2024-10-24 12:11:02,608 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 166 flow. Second operand 6 states and 178 transitions. [2024-10-24 12:11:02,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 276 flow [2024-10-24 12:11:02,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:11:02,636 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 198 flow [2024-10-24 12:11:02,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-10-24 12:11:02,637 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-10-24 12:11:02,638 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 198 flow [2024-10-24 12:11:02,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:02,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:02,638 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:02,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:11:02,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:11:02,839 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-24 12:11:02,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 159670203, now seen corresponding path program 2 times [2024-10-24 12:11:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788733864] [2024-10-24 12:11:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:11:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788733864] [2024-10-24 12:11:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788733864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:11:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607469626] [2024-10-24 12:11:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:11:02,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:11:02,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:11:02,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:11:02,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:11:03,053 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 12:11:03,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:11:03,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 12:11:03,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:11:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 12:11:03,077 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 12:11:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607469626] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:11:03,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 12:11:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-24 12:11:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294801529] [2024-10-24 12:11:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:11:03,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:11:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:11:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:11:03,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 71 [2024-10-24 12:11:03,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:03,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:03,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 71 [2024-10-24 12:11:03,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:11:18,305 INFO L124 PetriNetUnfolderBase]: 99317/141309 cut-off events. [2024-10-24 12:11:18,306 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-10-24 12:11:18,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270727 conditions, 141309 events. 99317/141309 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 3804. Compared 1042822 event pairs, 37636 based on Foata normal form. 0/124816 useless extension candidates. Maximal degree in co-relation 270690. Up to 67590 conditions per place. [2024-10-24 12:11:20,337 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 81 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-10-24 12:11:20,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 445 flow [2024-10-24 12:11:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:11:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:11:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-10-24 12:11:20,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647887323943662 [2024-10-24 12:11:20,339 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 198 flow. Second operand 3 states and 138 transitions. [2024-10-24 12:11:20,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 445 flow [2024-10-24 12:11:20,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 431 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 12:11:20,371 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 197 flow [2024-10-24 12:11:20,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-10-24 12:11:20,373 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-10-24 12:11:20,373 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 197 flow [2024-10-24 12:11:20,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:20,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:20,373 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:20,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:11:20,574 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,SelfDestructingSolverStorable14 [2024-10-24 12:11:20,574 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-24 12:11:20,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1992933710, now seen corresponding path program 1 times [2024-10-24 12:11:20,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:20,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304823441] [2024-10-24 12:11:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:20,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-24 12:11:20,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304823441] [2024-10-24 12:11:20,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304823441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:11:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124682111] [2024-10-24 12:11:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:20,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:11:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:11:20,689 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) [2024-10-24 12:11:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:11:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:20,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:11:20,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:11:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-24 12:11:20,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:11:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-24 12:11:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124682111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:11:20,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:11:20,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-24 12:11:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523932766] [2024-10-24 12:11:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:11:20,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:11:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:11:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:11:20,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-24 12:11:20,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:20,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:20,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-24 12:11:20,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:11:34,805 INFO L124 PetriNetUnfolderBase]: 90512/134390 cut-off events. [2024-10-24 12:11:34,805 INFO L125 PetriNetUnfolderBase]: For 15645/15645 co-relation queries the response was YES. [2024-10-24 12:11:35,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269491 conditions, 134390 events. 90512/134390 cut-off events. For 15645/15645 co-relation queries the response was YES. Maximal size of possible extension queue 3919. Compared 1054374 event pairs, 77731 based on Foata normal form. 2/116524 useless extension candidates. Maximal degree in co-relation 269451. Up to 115116 conditions per place. [2024-10-24 12:11:36,168 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 46 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-10-24 12:11:36,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 315 flow [2024-10-24 12:11:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:11:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:11:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-10-24 12:11:36,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3890845070422535 [2024-10-24 12:11:36,172 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 197 flow. Second operand 8 states and 221 transitions. [2024-10-24 12:11:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 315 flow [2024-10-24 12:11:36,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:11:36,233 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 230 flow [2024-10-24 12:11:36,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-10-24 12:11:36,235 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2024-10-24 12:11:36,236 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 230 flow [2024-10-24 12:11:36,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:36,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:36,236 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:36,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 12:11:36,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 12:11:36,437 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-24 12:11:36,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash 229966098, now seen corresponding path program 2 times [2024-10-24 12:11:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:36,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391421519] [2024-10-24 12:11:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:36,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:11:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:36,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:11:36,495 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:11:36,495 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-24 12:11:36,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-24 12:11:36,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-10-24 12:11:36,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-24 12:11:36,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-24 12:11:36,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-24 12:11:36,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-24 12:11:36,496 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-24 12:11:36,497 WARN L239 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:11:36,497 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-10-24 12:11:36,535 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:11:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 87 transitions, 214 flow [2024-10-24 12:11:36,549 INFO L124 PetriNetUnfolderBase]: 11/101 cut-off events. [2024-10-24 12:11:36,550 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-24 12:11:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 101 events. 11/101 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 275 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2024-10-24 12:11:36,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 87 transitions, 214 flow [2024-10-24 12:11:36,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 87 transitions, 214 flow [2024-10-24 12:11:36,554 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:11:36,554 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;@5b536040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:11:36,555 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-24 12:11:36,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:11:36,559 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-10-24 12:11:36,559 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-24 12:11:36,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:36,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:36,559 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-10-24 12:11:36,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash -66832630, now seen corresponding path program 1 times [2024-10-24 12:11:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:36,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041883424] [2024-10-24 12:11:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:11:36,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:36,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041883424] [2024-10-24 12:11:36,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041883424] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:11:36,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:11:36,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:11:36,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156559318] [2024-10-24 12:11:36,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:11:36,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:11:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:11:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:11:36,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-10-24 12:11:36,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:11:36,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:36,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-10-24 12:11:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand