./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:28:54,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:28:54,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:28:54,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:28:54,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:28:54,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:28:54,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:28:54,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:28:54,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:28:54,831 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:28:54,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:28:54,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:28:54,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:28:54,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:28:54,835 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:28:54,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:28:54,836 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:28:54,836 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:28:54,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:28:54,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:28:54,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:28:54,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:28:54,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:28:54,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:28:54,839 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:28:54,839 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:28:54,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:28:54,840 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:28:54,840 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:28:54,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:28:54,841 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:28:54,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:28:54,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:28:54,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:28:54,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:28:54,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:28:54,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:28:54,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:28:54,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:28:54,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:28:54,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:28:54,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:28:54,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2024-11-22 13:28:55,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:28:55,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:28:55,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:28:55,148 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:28:55,149 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:28:55,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-22 13:28:56,608 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:28:56,836 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:28:56,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-22 13:28:56,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4505b6fb2/0ca18900824f4f5f8deb192ee2812885/FLAG8be5aa2ed [2024-11-22 13:28:57,175 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4505b6fb2/0ca18900824f4f5f8deb192ee2812885 [2024-11-22 13:28:57,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:28:57,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:28:57,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:28:57,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:28:57,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:28:57,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec22bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57, skipping insertion in model container [2024-11-22 13:28:57,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,237 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:28:57,570 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30746,30759] [2024-11-22 13:28:57,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:28:57,605 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:28:57,663 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30746,30759] [2024-11-22 13:28:57,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:28:57,717 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:28:57,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57 WrapperNode [2024-11-22 13:28:57,718 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:28:57,719 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:28:57,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:28:57,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:28:57,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,763 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2024-11-22 13:28:57,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:28:57,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:28:57,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:28:57,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:28:57,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,797 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]. [2024-11-22 13:28:57,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,811 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:28:57,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:28:57,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:28:57,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:28:57,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (1/1) ... [2024-11-22 13:28:57,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:28:57,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:28:57,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:28:57,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:28:57,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:28:57,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:28:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 13:28:57,919 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-22 13:28:57,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-22 13:28:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:28:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:28:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 13:28:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-22 13:28:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:28:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:28:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:28:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 13:28:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-22 13:28:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:28:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:28:57,924 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:28:58,056 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:28:58,058 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:28:58,219 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:28:58,219 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:28:58,414 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:28:58,415 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 13:28:58,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:28:58 BoogieIcfgContainer [2024-11-22 13:28:58,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:28:58,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:28:58,420 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:28:58,423 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:28:58,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:28:57" (1/3) ... [2024-11-22 13:28:58,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7d84d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:28:58, skipping insertion in model container [2024-11-22 13:28:58,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:28:57" (2/3) ... [2024-11-22 13:28:58,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7d84d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:28:58, skipping insertion in model container [2024-11-22 13:28:58,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:28:58" (3/3) ... [2024-11-22 13:28:58,426 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-11-22 13:28:58,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:28:58,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:28:58,444 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:28:58,487 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:28:58,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 23 transitions, 50 flow [2024-11-22 13:28:58,550 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-11-22 13:28:58,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:28:58,552 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. [2024-11-22 13:28:58,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 23 transitions, 50 flow [2024-11-22 13:28:58,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 23 transitions, 50 flow [2024-11-22 13:28:58,566 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:28:58,573 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;@5be8dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:28:58,573 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:28:58,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:28:58,580 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-11-22 13:28:58,580 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:28:58,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:28:58,581 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 13:28:58,581 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:28:58,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:28:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash -531527673, now seen corresponding path program 1 times [2024-11-22 13:28:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:28:58,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248689825] [2024-11-22 13:28:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:28:58,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:28:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:28:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:28:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248689825] [2024-11-22 13:28:58,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248689825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:28:58,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:28:58,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:28:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238526639] [2024-11-22 13:28:58,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:28:58,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:28:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:28:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:28:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:28:58,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-22 13:28:58,896 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) [2024-11-22 13:28:58,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:28:58,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-22 13:28:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:28:58,965 INFO L124 PetriNetUnfolderBase]: 20/67 cut-off events. [2024-11-22 13:28:58,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:28:58,966 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. [2024-11-22 13:28:58,968 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-11-22 13:28:58,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 80 flow [2024-11-22 13:28:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:28:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:28:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-22 13:28:58,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-11-22 13:28:58,982 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-11-22 13:28:58,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 80 flow [2024-11-22 13:28:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:28:58,990 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-11-22 13:28:58,992 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} [2024-11-22 13:28:58,996 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-22 13:28:58,996 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-11-22 13:28:58,996 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) [2024-11-22 13:28:58,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:28:58,997 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 13:28:58,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:28:58,998 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:28:58,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:28:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash 211174233, now seen corresponding path program 1 times [2024-11-22 13:28:59,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:28:59,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173999553] [2024-11-22 13:28:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:28:59,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:28:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:28:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:28:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173999553] [2024-11-22 13:28:59,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173999553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:28:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815734829] [2024-11-22 13:28:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:28:59,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:28:59,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:28:59,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:28:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:28:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:28:59,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-22 13:28:59,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:28:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:28:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815734829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:28:59,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:28:59,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-22 13:28:59,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620326092] [2024-11-22 13:28:59,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:28:59,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:28:59,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:28:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:28:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:28:59,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-22 13:28:59,288 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) [2024-11-22 13:28:59,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:28:59,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-22 13:28:59,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:28:59,378 INFO L124 PetriNetUnfolderBase]: 20/70 cut-off events. [2024-11-22 13:28:59,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:28:59,379 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. [2024-11-22 13:28:59,380 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2024-11-22 13:28:59,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 108 flow [2024-11-22 13:28:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:28:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:28:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-22 13:28:59,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-11-22 13:28:59,383 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 6 states and 58 transitions. [2024-11-22 13:28:59,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 108 flow [2024-11-22 13:28:59,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:28:59,385 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 90 flow [2024-11-22 13:28:59,385 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} [2024-11-22 13:28:59,386 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2024-11-22 13:28:59,386 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 90 flow [2024-11-22 13:28:59,386 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) [2024-11-22 13:28:59,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:28:59,386 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-22 13:28:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:28:59,587 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 [2024-11-22 13:28:59,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:28:59,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:28:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash 693030023, now seen corresponding path program 2 times [2024-11-22 13:28:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:28:59,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159996585] [2024-11-22 13:28:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:28:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:28:59,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:28:59,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:28:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:28:59,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159996585] [2024-11-22 13:28:59,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159996585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:28:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320573094] [2024-11-22 13:28:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:28:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:28:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:28:59,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:28:59,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:28:59,869 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:28:59,870 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:28:59,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:28:59,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:28:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:28:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:28:59,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320573094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:28:59,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:28:59,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-22 13:28:59,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105611435] [2024-11-22 13:28:59,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:28:59,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 13:28:59,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:28:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 13:28:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-22 13:28:59,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-22 13:28:59,944 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) [2024-11-22 13:28:59,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:28:59,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-22 13:28:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:00,028 INFO L124 PetriNetUnfolderBase]: 20/72 cut-off events. [2024-11-22 13:29:00,030 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 13:29:00,030 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. [2024-11-22 13:29:00,031 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2024-11-22 13:29:00,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 144 flow [2024-11-22 13:29:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:29:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:29:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-11-22 13:29:00,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3858695652173913 [2024-11-22 13:29:00,034 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 90 flow. Second operand 8 states and 71 transitions. [2024-11-22 13:29:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 144 flow [2024-11-22 13:29:00,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 130 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:00,039 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 112 flow [2024-11-22 13:29:00,039 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} [2024-11-22 13:29:00,040 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 17 predicate places. [2024-11-22 13:29:00,041 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 112 flow [2024-11-22 13:29:00,041 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) [2024-11-22 13:29:00,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:00,042 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-11-22 13:29:00,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:29:00,242 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 [2024-11-22 13:29:00,243 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:29:00,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1739003591, now seen corresponding path program 3 times [2024-11-22 13:29:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470242450] [2024-11-22 13:29:00,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:29:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:00,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:29:00,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-22 13:29:00,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:29:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:29:00,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:29:00,336 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:29:00,337 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:29:00,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:29:00,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-22 13:29:00,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:29:00,339 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-22 13:29:00,341 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:29:00,341 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-22 13:29:00,361 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:29:00,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 39 transitions, 88 flow [2024-11-22 13:29:00,374 INFO L124 PetriNetUnfolderBase]: 5/44 cut-off events. [2024-11-22 13:29:00,375 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:29:00,376 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. [2024-11-22 13:29:00,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 39 transitions, 88 flow [2024-11-22 13:29:00,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 39 transitions, 88 flow [2024-11-22 13:29:00,380 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:29:00,381 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;@5be8dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:29:00,381 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-22 13:29:00,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:29:00,386 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-11-22 13:29:00,387 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:29:00,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:00,387 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-11-22 13:29:00,387 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)] === [2024-11-22 13:29:00,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1043353845, now seen corresponding path program 1 times [2024-11-22 13:29:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29616080] [2024-11-22 13:29:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:00,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29616080] [2024-11-22 13:29:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29616080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:29:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:29:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:29:00,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449810793] [2024-11-22 13:29:00,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:29:00,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:29:00,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:29:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:29:00,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-22 13:29:00,436 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) [2024-11-22 13:29:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:00,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-22 13:29:00,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:00,716 INFO L124 PetriNetUnfolderBase]: 434/922 cut-off events. [2024-11-22 13:29:00,718 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-22 13:29:00,722 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. [2024-11-22 13:29:00,730 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-22 13:29:00,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 136 flow [2024-11-22 13:29:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:29:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:29:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-11-22 13:29:00,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-22 13:29:00,736 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 88 flow. Second operand 3 states and 63 transitions. [2024-11-22 13:29:00,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 136 flow [2024-11-22 13:29:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:29:00,739 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 94 flow [2024-11-22 13:29:00,739 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} [2024-11-22 13:29:00,740 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-11-22 13:29:00,740 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 94 flow [2024-11-22 13:29:00,741 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) [2024-11-22 13:29:00,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:00,741 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:00,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 13:29:00,741 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)] === [2024-11-22 13:29:00,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2137667530, now seen corresponding path program 1 times [2024-11-22 13:29:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816722361] [2024-11-22 13:29:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816722361] [2024-11-22 13:29:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816722361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092863973] [2024-11-22 13:29:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:00,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:00,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:29:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:00,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-22 13:29:00,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:00,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:00,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092863973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:00,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:00,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-22 13:29:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396132965] [2024-11-22 13:29:00,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:00,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:29:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:29:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:29:00,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-22 13:29:00,910 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) [2024-11-22 13:29:00,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:00,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-22 13:29:00,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:01,070 INFO L124 PetriNetUnfolderBase]: 434/925 cut-off events. [2024-11-22 13:29:01,070 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-22 13:29:01,073 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. [2024-11-22 13:29:01,078 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-11-22 13:29:01,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 164 flow [2024-11-22 13:29:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:29:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:29:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-22 13:29:01,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-11-22 13:29:01,083 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 94 flow. Second operand 6 states and 98 transitions. [2024-11-22 13:29:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 164 flow [2024-11-22 13:29:01,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 160 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:01,085 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 126 flow [2024-11-22 13:29:01,085 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} [2024-11-22 13:29:01,086 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2024-11-22 13:29:01,087 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 126 flow [2024-11-22 13:29:01,087 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) [2024-11-22 13:29:01,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:01,088 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-11-22 13:29:01,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:29:01,291 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 [2024-11-22 13:29:01,292 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)] === [2024-11-22 13:29:01,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1327636939, now seen corresponding path program 2 times [2024-11-22 13:29:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:01,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702039633] [2024-11-22 13:29:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:29:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:01,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:29:01,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:29:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:01,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702039633] [2024-11-22 13:29:01,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702039633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:01,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485879670] [2024-11-22 13:29:01,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:29:01,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:01,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:01,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:01,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:29:01,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:29:01,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:29:01,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:29:01,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:01,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:29:01,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485879670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:01,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:01,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-22 13:29:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740687898] [2024-11-22 13:29:01,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:01,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 13:29:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 13:29:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-22 13:29:01,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-22 13:29:01,548 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) [2024-11-22 13:29:01,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:01,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-22 13:29:01,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:01,720 INFO L124 PetriNetUnfolderBase]: 434/927 cut-off events. [2024-11-22 13:29:01,721 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-22 13:29:01,723 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. [2024-11-22 13:29:01,728 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-11-22 13:29:01,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 200 flow [2024-11-22 13:29:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:29:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:29:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-11-22 13:29:01,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2024-11-22 13:29:01,730 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 126 flow. Second operand 8 states and 121 transitions. [2024-11-22 13:29:01,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 200 flow [2024-11-22 13:29:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 186 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:01,732 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 148 flow [2024-11-22 13:29:01,733 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} [2024-11-22 13:29:01,733 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2024-11-22 13:29:01,734 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 148 flow [2024-11-22 13:29:01,734 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) [2024-11-22 13:29:01,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:01,734 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-11-22 13:29:01,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:29:01,935 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 [2024-11-22 13:29:01,935 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)] === [2024-11-22 13:29:01,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -487823147, now seen corresponding path program 3 times [2024-11-22 13:29:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266112026] [2024-11-22 13:29:01,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:29:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:01,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:29:01,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-22 13:29:01,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:29:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:29:01,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:29:01,977 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:29:01,977 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-22 13:29:01,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-22 13:29:01,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-22 13:29:01,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-22 13:29:01,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 13:29:01,978 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-22 13:29:01,979 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:29:01,979 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-22 13:29:02,017 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:29:02,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 55 transitions, 128 flow [2024-11-22 13:29:02,027 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2024-11-22 13:29:02,027 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 13:29:02,027 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. [2024-11-22 13:29:02,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 55 transitions, 128 flow [2024-11-22 13:29:02,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 55 transitions, 128 flow [2024-11-22 13:29:02,029 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:29:02,030 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;@5be8dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:29:02,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-22 13:29:02,036 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:29:02,036 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-11-22 13:29:02,036 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 13:29:02,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:02,037 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:02,037 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)] === [2024-11-22 13:29:02,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1422539676, now seen corresponding path program 1 times [2024-11-22 13:29:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:02,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014935106] [2024-11-22 13:29:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:02,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:02,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:02,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014935106] [2024-11-22 13:29:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014935106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:29:02,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:29:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:29:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968504849] [2024-11-22 13:29:02,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:29:02,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:29:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:29:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:29:02,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-22 13:29:02,065 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) [2024-11-22 13:29:02,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:02,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-22 13:29:02,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:03,294 INFO L124 PetriNetUnfolderBase]: 6347/10809 cut-off events. [2024-11-22 13:29:03,295 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-11-22 13:29:03,315 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. [2024-11-22 13:29:03,374 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 34 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-22 13:29:03,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 194 flow [2024-11-22 13:29:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:29:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:29:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-22 13:29:03,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-11-22 13:29:03,377 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 89 transitions. [2024-11-22 13:29:03,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 194 flow [2024-11-22 13:29:03,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 192 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-22 13:29:03,381 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 130 flow [2024-11-22 13:29:03,381 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} [2024-11-22 13:29:03,382 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-11-22 13:29:03,382 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 130 flow [2024-11-22 13:29:03,382 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) [2024-11-22 13:29:03,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:03,383 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:03,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 13:29:03,383 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)] === [2024-11-22 13:29:03,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1561247080, now seen corresponding path program 1 times [2024-11-22 13:29:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914717433] [2024-11-22 13:29:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:03,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914717433] [2024-11-22 13:29:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914717433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462591020] [2024-11-22 13:29:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:03,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:03,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:03,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:29:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:03,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-22 13:29:03,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:03,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:03,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462591020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:03,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:03,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-22 13:29:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190259698] [2024-11-22 13:29:03,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:03,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:29:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:29:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:29:03,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-22 13:29:03,542 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) [2024-11-22 13:29:03,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:03,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-22 13:29:03,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:04,617 INFO L124 PetriNetUnfolderBase]: 6347/10812 cut-off events. [2024-11-22 13:29:04,617 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-22 13:29:04,646 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. [2024-11-22 13:29:04,701 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-22 13:29:04,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 220 flow [2024-11-22 13:29:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:29:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:29:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-22 13:29:04,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-11-22 13:29:04,703 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 130 flow. Second operand 6 states and 138 transitions. [2024-11-22 13:29:04,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 220 flow [2024-11-22 13:29:04,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:04,706 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 162 flow [2024-11-22 13:29:04,706 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} [2024-11-22 13:29:04,707 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-11-22 13:29:04,707 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 162 flow [2024-11-22 13:29:04,708 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) [2024-11-22 13:29:04,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:04,708 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:04,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:29:04,908 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 [2024-11-22 13:29:04,909 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)] === [2024-11-22 13:29:04,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2101195108, now seen corresponding path program 2 times [2024-11-22 13:29:04,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331575733] [2024-11-22 13:29:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:29:04,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:04,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:29:04,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:29:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331575733] [2024-11-22 13:29:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331575733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908015204] [2024-11-22 13:29:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:29:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:05,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:05,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:29:05,165 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:29:05,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:29:05,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:29:05,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:05,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:29:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908015204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:05,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:05,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-22 13:29:05,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87007172] [2024-11-22 13:29:05,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:05,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 13:29:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:05,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 13:29:05,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-22 13:29:05,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-22 13:29:05,242 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) [2024-11-22 13:29:05,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:05,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-22 13:29:05,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:06,210 INFO L124 PetriNetUnfolderBase]: 6347/10814 cut-off events. [2024-11-22 13:29:06,210 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-22 13:29:06,241 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. [2024-11-22 13:29:06,294 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-11-22 13:29:06,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 256 flow [2024-11-22 13:29:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:29:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:29:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-11-22 13:29:06,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-11-22 13:29:06,297 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 162 flow. Second operand 8 states and 171 transitions. [2024-11-22 13:29:06,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 256 flow [2024-11-22 13:29:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 57 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:06,300 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 184 flow [2024-11-22 13:29:06,301 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} [2024-11-22 13:29:06,301 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-11-22 13:29:06,302 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 184 flow [2024-11-22 13:29:06,302 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) [2024-11-22 13:29:06,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:06,304 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:06,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 13:29:06,505 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 [2024-11-22 13:29:06,507 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)] === [2024-11-22 13:29:06,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash 308688868, now seen corresponding path program 3 times [2024-11-22 13:29:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24126713] [2024-11-22 13:29:06,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:29:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:06,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:29:06,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-22 13:29:06,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:29:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:29:06,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:29:06,558 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:29:06,558 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-22 13:29:06,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-22 13:29:06,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-22 13:29:06,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-22 13:29:06,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-22 13:29:06,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 13:29:06,559 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-22 13:29:06,560 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:29:06,560 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-22 13:29:06,598 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:29:06,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 170 flow [2024-11-22 13:29:06,612 INFO L124 PetriNetUnfolderBase]: 9/82 cut-off events. [2024-11-22 13:29:06,612 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-22 13:29:06,613 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. [2024-11-22 13:29:06,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 71 transitions, 170 flow [2024-11-22 13:29:06,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 71 transitions, 170 flow [2024-11-22 13:29:06,615 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:29:06,615 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;@5be8dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:29:06,615 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-22 13:29:06,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:29:06,622 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-11-22 13:29:06,622 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-22 13:29:06,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:06,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:06,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-22 13:29:06,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1001218811, now seen corresponding path program 1 times [2024-11-22 13:29:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280480642] [2024-11-22 13:29:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:29:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280480642] [2024-11-22 13:29:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280480642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:29:06,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:29:06,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:29:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486825968] [2024-11-22 13:29:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:29:06,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:29:06,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:06,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:29:06,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:29:06,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-22 13:29:06,682 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) [2024-11-22 13:29:06,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:06,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-22 13:29:06,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:15,421 INFO L124 PetriNetUnfolderBase]: 79247/119475 cut-off events. [2024-11-22 13:29:15,422 INFO L125 PetriNetUnfolderBase]: For 9589/9589 co-relation queries the response was YES. [2024-11-22 13:29:15,620 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. [2024-11-22 13:29:16,222 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-22 13:29:16,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 254 flow [2024-11-22 13:29:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:29:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:29:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-22 13:29:16,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.539906103286385 [2024-11-22 13:29:16,226 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 170 flow. Second operand 3 states and 115 transitions. [2024-11-22 13:29:16,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 254 flow [2024-11-22 13:29:16,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 248 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-22 13:29:16,236 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 166 flow [2024-11-22 13:29:16,236 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} [2024-11-22 13:29:16,237 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-22 13:29:16,237 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 166 flow [2024-11-22 13:29:16,239 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) [2024-11-22 13:29:16,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:16,239 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:16,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 13:29:16,239 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-22 13:29:16,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 658252622, now seen corresponding path program 1 times [2024-11-22 13:29:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248169561] [2024-11-22 13:29:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:29:16,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248169561] [2024-11-22 13:29:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248169561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582155950] [2024-11-22 13:29:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:16,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:16,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:29:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:16,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-22 13:29:16,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:29:16,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:29:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582155950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:16,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-22 13:29:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801994647] [2024-11-22 13:29:16,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:16,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:29:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:29:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:29:16,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-22 13:29:16,411 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) [2024-11-22 13:29:16,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:16,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-22 13:29:16,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:25,242 INFO L124 PetriNetUnfolderBase]: 79247/119478 cut-off events. [2024-11-22 13:29:25,243 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2024-11-22 13:29:25,500 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. [2024-11-22 13:29:26,035 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 44 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-22 13:29:26,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 276 flow [2024-11-22 13:29:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:29:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:29:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-11-22 13:29:26,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2024-11-22 13:29:26,037 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 166 flow. Second operand 6 states and 178 transitions. [2024-11-22 13:29:26,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 276 flow [2024-11-22 13:29:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:26,055 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 198 flow [2024-11-22 13:29:26,056 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} [2024-11-22 13:29:26,056 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-11-22 13:29:26,056 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 198 flow [2024-11-22 13:29:26,056 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) [2024-11-22 13:29:26,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:26,057 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:26,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 13:29:26,257 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 [2024-11-22 13:29:26,257 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-22 13:29:26,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 159670203, now seen corresponding path program 2 times [2024-11-22 13:29:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004144207] [2024-11-22 13:29:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:29:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:26,277 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 13:29:26,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:29:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:29:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004144207] [2024-11-22 13:29:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004144207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:29:26,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:29:26,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:29:26,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386654279] [2024-11-22 13:29:26,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:29:26,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:29:26,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:29:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:29:26,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 71 [2024-11-22 13:29:26,342 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) [2024-11-22 13:29:26,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:26,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 71 [2024-11-22 13:29:26,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:29:35,548 INFO L124 PetriNetUnfolderBase]: 99317/141309 cut-off events. [2024-11-22 13:29:35,548 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-11-22 13:29:35,898 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. [2024-11-22 13:29:36,380 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 81 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-11-22 13:29:36,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 445 flow [2024-11-22 13:29:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:29:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:29:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-22 13:29:36,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647887323943662 [2024-11-22 13:29:36,381 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 198 flow. Second operand 3 states and 138 transitions. [2024-11-22 13:29:36,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 445 flow [2024-11-22 13:29:36,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 431 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:29:36,390 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 197 flow [2024-11-22 13:29:36,391 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} [2024-11-22 13:29:36,391 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-11-22 13:29:36,391 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 197 flow [2024-11-22 13:29:36,392 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) [2024-11-22 13:29:36,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:29:36,392 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:29:36,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 13:29:36,392 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)] === [2024-11-22 13:29:36,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:29:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1992933710, now seen corresponding path program 1 times [2024-11-22 13:29:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:29:36,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548853636] [2024-11-22 13:29:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:29:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 13:29:36,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:29:36,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548853636] [2024-11-22 13:29:36,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548853636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:29:36,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577912117] [2024-11-22 13:29:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:29:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:29:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:29:36,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:29:36,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:29:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:29:36,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:29:36,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:29:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 13:29:36,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:29:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 13:29:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577912117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:29:36,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:29:36,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-22 13:29:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058211961] [2024-11-22 13:29:36,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:29:36,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 13:29:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:29:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 13:29:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-22 13:29:36,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-22 13:29:36,629 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) [2024-11-22 13:29:36,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:29:36,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-22 13:29:36,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand