./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 94001a9ab0492f7774a7e81f183179cf0060947b701e48f51b2989eec22ae051 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:20:04,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:20:04,568 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:20:04,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:20:04,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:20:04,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:20:04,602 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:20:04,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:20:04,603 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:20:04,605 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:20:04,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:20:04,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:20:04,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:20:04,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:20:04,608 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:20:04,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:20:04,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:20:04,609 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:20:04,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:20:04,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:20:04,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:20:04,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:20:04,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:20:04,612 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:20:04,612 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:20:04,612 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:20:04,613 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:20:04,613 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:20:04,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:20:04,614 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:20:04,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:20:04,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:20:04,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:20:04,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:20:04,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:20:04,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:20:04,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:20:04,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:20:04,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:20:04,617 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:20:04,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:20:04,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:20:04,617 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94001a9ab0492f7774a7e81f183179cf0060947b701e48f51b2989eec22ae051 [2024-10-11 14:20:04,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:20:04,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:20:04,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:20:04,889 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:20:04,889 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:20:04,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i [2024-10-11 14:20:06,280 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:20:06,514 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:20:06,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i [2024-10-11 14:20:06,540 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/cf9aa6615/b3107e96b9ba4373a68a68227eae1726/FLAG15fedd5dd [2024-10-11 14:20:06,855 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/cf9aa6615/b3107e96b9ba4373a68a68227eae1726 [2024-10-11 14:20:06,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:20:06,859 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:20:06,860 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:20:06,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:20:06,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:20:06,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:06" (1/1) ... [2024-10-11 14:20:06,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67acbaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:06, skipping insertion in model container [2024-10-11 14:20:06,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:06" (1/1) ... [2024-10-11 14:20:06,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:20:07,415 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i[47777,47790] [2024-10-11 14:20:07,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:20:07,450 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:20:07,484 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12-pthread.i[47777,47790] [2024-10-11 14:20:07,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:20:07,552 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:20:07,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07 WrapperNode [2024-10-11 14:20:07,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:20:07,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:20:07,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:20:07,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:20:07,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,615 INFO L138 Inliner]: procedures = 272, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-10-11 14:20:07,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:20:07,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:20:07,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:20:07,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:20:07,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,657 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-10-11 14:20:07,661 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,679 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:20:07,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:20:07,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:20:07,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:20:07,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:20:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:20:07,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:20:07,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:20:07,775 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-10-11 14:20:07,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-10-11 14:20:07,776 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:20:07,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:20:07,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:20:07,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 14:20:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:20:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:20:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:20:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:20:07,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:20:07,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 14:20:07,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:20:07,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:20:07,780 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:20:07,910 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:20:07,913 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:20:08,061 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:20:08,061 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:20:08,192 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:20:08,192 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:20:08,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:08 BoogieIcfgContainer [2024-10-11 14:20:08,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:20:08,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:20:08,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:20:08,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:20:08,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:20:06" (1/3) ... [2024-10-11 14:20:08,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6ed173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:08, skipping insertion in model container [2024-10-11 14:20:08,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07" (2/3) ... [2024-10-11 14:20:08,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6ed173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:08, skipping insertion in model container [2024-10-11 14:20:08,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:08" (3/3) ... [2024-10-11 14:20:08,202 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12-pthread.i [2024-10-11 14:20:08,220 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:20:08,220 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:20:08,220 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:20:08,257 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:08,324 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-11 14:20:08,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:20:08,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-11 14:20:08,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:08,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:08,339 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:08,347 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;@68bb9fa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:08,348 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:20:08,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:08,358 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-11 14:20:08,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:20:08,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:08,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-11 14:20:08,360 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:20:08,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2000549642, now seen corresponding path program 1 times [2024-10-11 14:20:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181206744] [2024-10-11 14:20:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:08,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:08,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:08,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:08,579 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:08,580 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:20:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:20:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:20:08,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:20:08,583 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:20:08,588 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:08,588 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:20:08,611 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:08,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:08,630 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-10-11 14:20:08,631 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:20:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 4/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2024-10-11 14:20:08,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:08,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:08,637 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:08,639 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;@68bb9fa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:08,639 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:20:08,649 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:08,649 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2024-10-11 14:20:08,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:20:08,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:08,650 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-11 14:20:08,650 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:20:08,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1308452422, now seen corresponding path program 1 times [2024-10-11 14:20:08,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:08,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008418777] [2024-10-11 14:20:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:08,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:08,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:08,734 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:08,734 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:20:08,734 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:20:08,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:20:08,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:20:08,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:20:08,735 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:20:08,736 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:08,736 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:20:08,767 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:08,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:08,788 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2024-10-11 14:20:08,789 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:20:08,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 6/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2024-10-11 14:20:08,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:08,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:08,791 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:08,793 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;@68bb9fa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:08,793 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:20:08,801 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:08,801 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-11 14:20:08,801 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:20:08,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:08,801 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:08,802 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:20:08,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1215009957, now seen corresponding path program 1 times [2024-10-11 14:20:08,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:08,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197335677] [2024-10-11 14:20:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197335677] [2024-10-11 14:20:09,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197335677] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:09,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:09,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057401992] [2024-10-11 14:20:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:09,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:09,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-10-11 14:20:09,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:09,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:09,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-10-11 14:20:09,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:10,928 INFO L124 PetriNetUnfolderBase]: 8697/13361 cut-off events. [2024-10-11 14:20:10,928 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-11 14:20:10,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25692 conditions, 13361 events. 8697/13361 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 85664 event pairs, 1822 based on Foata normal form. 963/11918 useless extension candidates. Maximal degree in co-relation 17521. Up to 6186 conditions per place. [2024-10-11 14:20:11,023 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 101 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-10-11 14:20:11,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 552 flow [2024-10-11 14:20:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-10-11 14:20:11,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-10-11 14:20:11,041 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 7 states and 206 transitions. [2024-10-11 14:20:11,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 552 flow [2024-10-11 14:20:11,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 124 transitions, 540 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:11,054 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 180 flow [2024-10-11 14:20:11,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-10-11 14:20:11,060 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-10-11 14:20:11,061 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 180 flow [2024-10-11 14:20:11,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:11,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:11,062 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-11 14:20:11,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:20:11,063 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:20:11,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1404850549, now seen corresponding path program 1 times [2024-10-11 14:20:11,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:11,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440311808] [2024-10-11 14:20:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:11,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:11,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:11,098 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:11,099 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:20:11,099 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:20:11,099 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:20:11,099 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:20:11,099 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:20:11,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:20:11,099 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:20:11,100 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:11,100 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:20:11,126 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:11,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,134 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-10-11 14:20:11,134 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:20:11,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 8/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2024-10-11 14:20:11,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,137 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:11,138 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;@68bb9fa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:11,138 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:20:11,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:11,141 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-11 14:20:11,141 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 14:20:11,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:11,142 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:11,142 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:11,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 386656586, now seen corresponding path program 1 times [2024-10-11 14:20:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:11,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69417] [2024-10-11 14:20:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:11,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69417] [2024-10-11 14:20:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474439391] [2024-10-11 14:20:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:11,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:11,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:11,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:11,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:21,741 INFO L124 PetriNetUnfolderBase]: 98406/139181 cut-off events. [2024-10-11 14:20:21,742 INFO L125 PetriNetUnfolderBase]: For 9968/9968 co-relation queries the response was YES. [2024-10-11 14:20:21,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268044 conditions, 139181 events. 98406/139181 cut-off events. For 9968/9968 co-relation queries the response was YES. Maximal size of possible extension queue 4533. Compared 1021622 event pairs, 23839 based on Foata normal form. 11088/124076 useless extension candidates. Maximal degree in co-relation 136295. Up to 65703 conditions per place. [2024-10-11 14:20:22,827 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 139 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2024-10-11 14:20:22,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 168 transitions, 775 flow [2024-10-11 14:20:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 278 transitions. [2024-10-11 14:20:22,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-10-11 14:20:22,836 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 142 flow. Second operand 7 states and 278 transitions. [2024-10-11 14:20:22,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 168 transitions, 775 flow [2024-10-11 14:20:22,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 168 transitions, 739 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:22,853 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 226 flow [2024-10-11 14:20:22,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-10-11 14:20:22,854 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-11 14:20:22,855 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 226 flow [2024-10-11 14:20:22,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:22,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:22,855 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:22,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:20:22,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:22,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:22,857 INFO L85 PathProgramCache]: Analyzing trace with hash 918357021, now seen corresponding path program 1 times [2024-10-11 14:20:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:22,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443232486] [2024-10-11 14:20:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:20:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443232486] [2024-10-11 14:20:23,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443232486] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:23,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:23,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065101862] [2024-10-11 14:20:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:23,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:23,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:23,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:23,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:23,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:23,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:23,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:38,339 INFO L124 PetriNetUnfolderBase]: 153451/218781 cut-off events. [2024-10-11 14:20:38,339 INFO L125 PetriNetUnfolderBase]: For 86609/88706 co-relation queries the response was YES. [2024-10-11 14:20:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477648 conditions, 218781 events. 153451/218781 cut-off events. For 86609/88706 co-relation queries the response was YES. Maximal size of possible extension queue 7564. Compared 1725334 event pairs, 43744 based on Foata normal form. 0/187554 useless extension candidates. Maximal degree in co-relation 398346. Up to 112061 conditions per place. [2024-10-11 14:20:40,370 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 145 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2024-10-11 14:20:40,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 180 transitions, 948 flow [2024-10-11 14:20:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2024-10-11 14:20:40,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-10-11 14:20:40,375 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 226 flow. Second operand 7 states and 255 transitions. [2024-10-11 14:20:40,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 180 transitions, 948 flow [2024-10-11 14:20:40,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 180 transitions, 948 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:40,719 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 346 flow [2024-10-11 14:20:40,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-10-11 14:20:40,720 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-11 14:20:40,720 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 346 flow [2024-10-11 14:20:40,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:40,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:40,721 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:40,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:20:40,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:40,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -214616536, now seen corresponding path program 1 times [2024-10-11 14:20:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:40,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408256434] [2024-10-11 14:20:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408256434] [2024-10-11 14:20:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408256434] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:20:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415668104] [2024-10-11 14:20:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:40,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:20:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:20:40,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:20:40,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:20:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:41,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:20:41,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:20:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:41,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:20:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415668104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:20:41,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:20:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-10-11 14:20:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484724045] [2024-10-11 14:20:41,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:20:41,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:20:41,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:20:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:20:41,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:41,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 346 flow. Second operand has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:20:41,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:41,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:41,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand