./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44a70169ef8abd67c211072db1308f16df00422231dd8f14aa88bc39d0b023bb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 17:47:49,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 17:47:49,642 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 17:47:49,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 17:47:49,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 17:47:49,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 17:47:49,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 17:47:49,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 17:47:49,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 17:47:49,677 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 17:47:49,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 17:47:49,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 17:47:49,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 17:47:49,679 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 17:47:49,680 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 17:47:49,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 17:47:49,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 17:47:49,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 17:47:49,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 17:47:49,681 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 17:47:49,681 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 17:47:49,684 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 17:47:49,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 17:47:49,685 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 17:47:49,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 17:47:49,685 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 17:47:49,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 17:47:49,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:47:49,685 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 17:47:49,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 17:47:49,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 17:47:49,688 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a70169ef8abd67c211072db1308f16df00422231dd8f14aa88bc39d0b023bb [2024-11-10 17:47:49,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 17:47:49,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 17:47:49,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 17:47:49,916 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 17:47:49,916 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 17:47:49,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-11-10 17:47:51,116 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 17:47:51,342 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 17:47:51,343 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-11-10 17:47:51,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d8b85e6/1f189553a2d14831bb2e2594967ab4c5/FLAG70deddf82 [2024-11-10 17:47:51,691 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d8b85e6/1f189553a2d14831bb2e2594967ab4c5 [2024-11-10 17:47:51,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 17:47:51,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 17:47:51,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 17:47:51,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 17:47:51,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 17:47:51,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:47:51" (1/1) ... [2024-11-10 17:47:51,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b5cc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:51, skipping insertion in model container [2024-11-10 17:47:51,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:47:51" (1/1) ... [2024-11-10 17:47:51,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 17:47:51,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:47:51,997 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 17:47:52,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:47:52,080 INFO L204 MainTranslator]: Completed translation [2024-11-10 17:47:52,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52 WrapperNode [2024-11-10 17:47:52,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 17:47:52,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 17:47:52,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 17:47:52,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 17:47:52,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,121 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2024-11-10 17:47:52,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 17:47:52,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 17:47:52,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 17:47:52,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 17:47:52,131 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,148 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 0 writes are split as follows [0, 0, 0]. [2024-11-10 17:47:52,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,153 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 17:47:52,160 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 17:47:52,160 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 17:47:52,160 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 17:47:52,162 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (1/1) ... [2024-11-10 17:47:52,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:47:52,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:47:52,193 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) [2024-11-10 17:47:52,194 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 [2024-11-10 17:47:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 17:47:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 17:47:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 17:47:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-10 17:47:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-10 17:47:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 17:47:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 17:47:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 17:47:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 17:47:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 17:47:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 17:47:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 17:47:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 17:47:52,228 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 17:47:52,317 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 17:47:52,318 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 17:47:52,427 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 17:47:52,428 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 17:47:52,554 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 17:47:52,555 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 17:47:52,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:47:52 BoogieIcfgContainer [2024-11-10 17:47:52,555 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 17:47:52,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 17:47:52,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 17:47:52,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 17:47:52,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:47:51" (1/3) ... [2024-11-10 17:47:52,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:47:52, skipping insertion in model container [2024-11-10 17:47:52,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:52" (2/3) ... [2024-11-10 17:47:52,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:47:52, skipping insertion in model container [2024-11-10 17:47:52,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:47:52" (3/3) ... [2024-11-10 17:47:52,562 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-zero.i [2024-11-10 17:47:52,575 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 17:47:52,575 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-11-10 17:47:52,575 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 17:47:52,611 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:52,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 34 transitions, 72 flow [2024-11-10 17:47:52,685 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-11-10 17:47:52,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:52,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 7/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2024-11-10 17:47:52,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 34 transitions, 72 flow [2024-11-10 17:47:52,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 34 transitions, 72 flow [2024-11-10 17:47:52,704 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:52,712 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=None, 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;@6c8e37a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:52,712 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-10 17:47:52,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:52,731 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:52,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:52,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:52,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:52,732 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-11-10 17:47:52,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 7042024, now seen corresponding path program 1 times [2024-11-10 17:47:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398490232] [2024-11-10 17:47:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398490232] [2024-11-10 17:47:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398490232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187692582] [2024-11-10 17:47:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:52,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:52,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 34 [2024-11-10 17:47:52,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 34 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:52,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:52,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 34 [2024-11-10 17:47:52,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:52,912 INFO L124 PetriNetUnfolderBase]: 16/71 cut-off events. [2024-11-10 17:47:52,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:52,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 71 events. 16/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 203 event pairs, 12 based on Foata normal form. 18/82 useless extension candidates. Maximal degree in co-relation 98. Up to 39 conditions per place. [2024-11-10 17:47:52,913 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 11 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2024-11-10 17:47:52,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 76 flow [2024-11-10 17:47:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 48 transitions. [2024-11-10 17:47:52,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2024-11-10 17:47:52,923 INFO L175 Difference]: Start difference. First operand has 31 places, 34 transitions, 72 flow. Second operand 2 states and 48 transitions. [2024-11-10 17:47:52,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 76 flow [2024-11-10 17:47:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:52,926 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 54 flow [2024-11-10 17:47:52,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2024-11-10 17:47:52,930 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2024-11-10 17:47:52,930 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 54 flow [2024-11-10 17:47:52,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:52,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:52,931 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-10 17:47:52,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 17:47:52,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-11-10 17:47:52,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -307383503, now seen corresponding path program 1 times [2024-11-10 17:47:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:52,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419553465] [2024-11-10 17:47:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:52,960 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 17:47:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:52,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 17:47:52,985 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 17:47:52,986 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-10 17:47:52,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-10 17:47:52,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-10 17:47:52,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2024-11-10 17:47:52,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-11-10 17:47:52,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-11-10 17:47:52,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-11-10 17:47:52,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-10 17:47:52,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 17:47:52,990 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 17:47:52,992 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 17:47:52,993 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 17:47:53,018 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:53,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 58 transitions, 126 flow [2024-11-10 17:47:53,029 INFO L124 PetriNetUnfolderBase]: 13/73 cut-off events. [2024-11-10 17:47:53,029 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:47:53,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 73 events. 13/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 197 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2024-11-10 17:47:53,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 58 transitions, 126 flow [2024-11-10 17:47:53,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 58 transitions, 126 flow [2024-11-10 17:47:53,032 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:53,032 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=None, 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;@6c8e37a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:53,032 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-10 17:47:53,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:53,034 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:53,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:53,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:53,034 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:53,035 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-10 17:47:53,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 8827496, now seen corresponding path program 1 times [2024-11-10 17:47:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934681430] [2024-11-10 17:47:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934681430] [2024-11-10 17:47:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934681430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:53,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736690516] [2024-11-10 17:47:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:53,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:53,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-10 17:47:53,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 58 transitions, 126 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-11-10 17:47:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:53,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-10 17:47:53,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:53,188 INFO L124 PetriNetUnfolderBase]: 282/753 cut-off events. [2024-11-10 17:47:53,190 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-10 17:47:53,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 753 events. 282/753 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4753 event pairs, 222 based on Foata normal form. 221/889 useless extension candidates. Maximal degree in co-relation 569. Up to 438 conditions per place. [2024-11-10 17:47:53,197 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 19 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2024-11-10 17:47:53,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 138 flow [2024-11-10 17:47:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 83 transitions. [2024-11-10 17:47:53,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7155172413793104 [2024-11-10 17:47:53,199 INFO L175 Difference]: Start difference. First operand has 52 places, 58 transitions, 126 flow. Second operand 2 states and 83 transitions. [2024-11-10 17:47:53,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 138 flow [2024-11-10 17:47:53,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:53,201 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 100 flow [2024-11-10 17:47:53,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-10 17:47:53,204 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-10 17:47:53,204 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 100 flow [2024-11-10 17:47:53,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-11-10 17:47:53,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:53,205 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:53,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 17:47:53,205 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-10 17:47:53,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -629320006, now seen corresponding path program 1 times [2024-11-10 17:47:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007767660] [2024-11-10 17:47:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:53,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007767660] [2024-11-10 17:47:53,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007767660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:53,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:53,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 17:47:53,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651900431] [2024-11-10 17:47:53,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:53,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:53,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-10 17:47:53,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-10 17:47:53,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:53,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-10 17:47:53,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:53,455 INFO L124 PetriNetUnfolderBase]: 282/738 cut-off events. [2024-11-10 17:47:53,456 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-10 17:47:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 738 events. 282/738 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4591 event pairs, 222 based on Foata normal form. 0/668 useless extension candidates. Maximal degree in co-relation 1198. Up to 437 conditions per place. [2024-11-10 17:47:53,461 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 18 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2024-11-10 17:47:53,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 134 flow [2024-11-10 17:47:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-10 17:47:53,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-11-10 17:47:53,462 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 100 flow. Second operand 3 states and 99 transitions. [2024-11-10 17:47:53,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 134 flow [2024-11-10 17:47:53,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:53,466 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 98 flow [2024-11-10 17:47:53,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-11-10 17:47:53,468 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-10 17:47:53,468 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 98 flow [2024-11-10 17:47:53,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-10 17:47:53,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:53,468 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:53,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 17:47:53,469 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-10 17:47:53,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash -629320005, now seen corresponding path program 1 times [2024-11-10 17:47:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:53,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310588112] [2024-11-10 17:47:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:53,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310588112] [2024-11-10 17:47:53,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310588112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:53,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:53,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:47:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74801654] [2024-11-10 17:47:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:53,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:47:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:47:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:47:53,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-10 17:47:53,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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) [2024-11-10 17:47:53,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:53,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-10 17:47:53,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:53,861 INFO L124 PetriNetUnfolderBase]: 431/1241 cut-off events. [2024-11-10 17:47:53,862 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-10 17:47:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1968 conditions, 1241 events. 431/1241 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9000 event pairs, 239 based on Foata normal form. 24/1176 useless extension candidates. Maximal degree in co-relation 1962. Up to 499 conditions per place. [2024-11-10 17:47:53,867 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 38 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-10 17:47:53,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 238 flow [2024-11-10 17:47:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:47:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:47:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 175 transitions. [2024-11-10 17:47:53,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-11-10 17:47:53,870 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 98 flow. Second operand 5 states and 175 transitions. [2024-11-10 17:47:53,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 238 flow [2024-11-10 17:47:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:53,873 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 124 flow [2024-11-10 17:47:53,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-10 17:47:53,873 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-10 17:47:53,874 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 124 flow [2024-11-10 17:47:53,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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) [2024-11-10 17:47:53,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:53,874 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-10 17:47:53,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 17:47:53,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-10 17:47:53,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -707680439, now seen corresponding path program 1 times [2024-11-10 17:47:53,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:53,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238945261] [2024-11-10 17:47:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:53,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:53,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 17:47:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:53,895 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 17:47:53,895 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 17:47:53,895 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-11-10 17:47:53,895 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2024-11-10 17:47:53,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-11-10 17:47:53,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2024-11-10 17:47:53,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2024-11-10 17:47:53,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-11-10 17:47:53,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-11-10 17:47:53,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2024-11-10 17:47:53,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-11-10 17:47:53,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-11-10 17:47:53,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-11-10 17:47:53,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 17:47:53,900 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 17:47:53,900 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 17:47:53,900 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 17:47:53,925 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:53,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 82 transitions, 182 flow [2024-11-10 17:47:53,934 INFO L124 PetriNetUnfolderBase]: 19/105 cut-off events. [2024-11-10 17:47:53,934 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 17:47:53,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 105 events. 19/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 321 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2024-11-10 17:47:53,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 82 transitions, 182 flow [2024-11-10 17:47:53,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 82 transitions, 182 flow [2024-11-10 17:47:53,936 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:53,937 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=None, 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;@6c8e37a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:53,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-10 17:47:53,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:53,939 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:53,939 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:53,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:53,939 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:53,939 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:53,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 11351784, now seen corresponding path program 1 times [2024-11-10 17:47:53,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:53,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730121982] [2024-11-10 17:47:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:53,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:53,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:53,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730121982] [2024-11-10 17:47:53,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730121982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:53,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:53,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52240947] [2024-11-10 17:47:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:53,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:53,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:53,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:53,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 82 [2024-11-10 17:47:53,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:53,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:53,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 82 [2024-11-10 17:47:53,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:54,398 INFO L124 PetriNetUnfolderBase]: 3159/6517 cut-off events. [2024-11-10 17:47:54,399 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2024-11-10 17:47:54,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11000 conditions, 6517 events. 3159/6517 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 54477 event pairs, 2574 based on Foata normal form. 2356/8258 useless extension candidates. Maximal degree in co-relation 1221. Up to 4260 conditions per place. [2024-11-10 17:47:54,435 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 27 selfloop transitions, 0 changer transitions 0/65 dead transitions. [2024-11-10 17:47:54,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 202 flow [2024-11-10 17:47:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 118 transitions. [2024-11-10 17:47:54,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7195121951219512 [2024-11-10 17:47:54,438 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 182 flow. Second operand 2 states and 118 transitions. [2024-11-10 17:47:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 202 flow [2024-11-10 17:47:54,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 200 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:54,442 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 146 flow [2024-11-10 17:47:54,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-11-10 17:47:54,443 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-11-10 17:47:54,444 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 146 flow [2024-11-10 17:47:54,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:54,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:54,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:54,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 17:47:54,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:54,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1539818415, now seen corresponding path program 1 times [2024-11-10 17:47:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:54,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987189158] [2024-11-10 17:47:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:54,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:54,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987189158] [2024-11-10 17:47:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987189158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:54,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 17:47:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036747328] [2024-11-10 17:47:54,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:54,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:54,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 82 [2024-11-10 17:47:54,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-11-10 17:47:54,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:54,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 82 [2024-11-10 17:47:54,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:55,007 INFO L124 PetriNetUnfolderBase]: 3159/6418 cut-off events. [2024-11-10 17:47:55,007 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2024-11-10 17:47:55,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10853 conditions, 6418 events. 3159/6418 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 52893 event pairs, 2574 based on Foata normal form. 0/5902 useless extension candidates. Maximal degree in co-relation 10847. Up to 4259 conditions per place. [2024-11-10 17:47:55,043 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 26 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2024-11-10 17:47:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 194 flow [2024-11-10 17:47:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-10 17:47:55,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-11-10 17:47:55,045 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 146 flow. Second operand 3 states and 141 transitions. [2024-11-10 17:47:55,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 194 flow [2024-11-10 17:47:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:55,047 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 142 flow [2024-11-10 17:47:55,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-11-10 17:47:55,048 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-11-10 17:47:55,048 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 142 flow [2024-11-10 17:47:55,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-11-10 17:47:55,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:55,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:55,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 17:47:55,049 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:55,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1539818414, now seen corresponding path program 1 times [2024-11-10 17:47:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:55,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535606632] [2024-11-10 17:47:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:55,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535606632] [2024-11-10 17:47:55,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535606632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:55,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:55,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:47:55,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332331031] [2024-11-10 17:47:55,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:55,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:47:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:55,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:47:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:47:55,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 82 [2024-11-10 17:47:55,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 17:47:55,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:55,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 82 [2024-11-10 17:47:55,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:56,043 INFO L124 PetriNetUnfolderBase]: 4880/11001 cut-off events. [2024-11-10 17:47:56,044 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2024-11-10 17:47:56,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17966 conditions, 11001 events. 4880/11001 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 105694 event pairs, 2966 based on Foata normal form. 171/10357 useless extension candidates. Maximal degree in co-relation 17959. Up to 4867 conditions per place. [2024-11-10 17:47:56,094 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 62 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-10 17:47:56,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 372 flow [2024-11-10 17:47:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:47:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:47:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-11-10 17:47:56,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6317073170731707 [2024-11-10 17:47:56,096 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 142 flow. Second operand 5 states and 259 transitions. [2024-11-10 17:47:56,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 372 flow [2024-11-10 17:47:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:56,098 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 168 flow [2024-11-10 17:47:56,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-11-10 17:47:56,099 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2024-11-10 17:47:56,099 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 168 flow [2024-11-10 17:47:56,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 17:47:56,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:56,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:56,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 17:47:56,102 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:56,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -680549869, now seen corresponding path program 1 times [2024-11-10 17:47:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277413926] [2024-11-10 17:47:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 17:47:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277413926] [2024-11-10 17:47:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277413926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:56,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:56,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:47:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681379044] [2024-11-10 17:47:56,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:56,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:47:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:47:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:47:56,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 82 [2024-11-10 17:47:56,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 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) [2024-11-10 17:47:56,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:56,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 82 [2024-11-10 17:47:56,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:57,243 INFO L124 PetriNetUnfolderBase]: 6238/13532 cut-off events. [2024-11-10 17:47:57,244 INFO L125 PetriNetUnfolderBase]: For 3269/3269 co-relation queries the response was YES. [2024-11-10 17:47:57,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24606 conditions, 13532 events. 6238/13532 cut-off events. For 3269/3269 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 128330 event pairs, 3541 based on Foata normal form. 216/12754 useless extension candidates. Maximal degree in co-relation 24597. Up to 6249 conditions per place. [2024-11-10 17:47:57,333 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 66 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2024-11-10 17:47:57,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 432 flow [2024-11-10 17:47:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:47:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:47:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-10 17:47:57,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6268292682926829 [2024-11-10 17:47:57,335 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 168 flow. Second operand 5 states and 257 transitions. [2024-11-10 17:47:57,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 432 flow [2024-11-10 17:47:57,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:57,339 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 194 flow [2024-11-10 17:47:57,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-10 17:47:57,339 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2024-11-10 17:47:57,339 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 194 flow [2024-11-10 17:47:57,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 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) [2024-11-10 17:47:57,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:57,340 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:57,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 17:47:57,340 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:57,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 452959276, now seen corresponding path program 1 times [2024-11-10 17:47:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:57,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152554074] [2024-11-10 17:47:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152554074] [2024-11-10 17:47:57,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152554074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:47:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601685594] [2024-11-10 17:47:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:57,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:47:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:47:57,575 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) [2024-11-10 17:47:57,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 17:47:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:57,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 17:47:57,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:47:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:57,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:47:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601685594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:47:57,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:47:57,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 17:47:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502913624] [2024-11-10 17:47:57,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:47:57,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 17:47:57,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 17:47:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-10 17:47:58,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 82 [2024-11-10 17:47:58,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 194 flow. Second operand has 11 states, 11 states have (on average 39.90909090909091) internal successors, (439), 11 states have internal predecessors, (439), 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) [2024-11-10 17:47:58,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:58,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 82 [2024-11-10 17:47:58,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:59,587 INFO L124 PetriNetUnfolderBase]: 9790/22084 cut-off events. [2024-11-10 17:47:59,588 INFO L125 PetriNetUnfolderBase]: For 7425/7425 co-relation queries the response was YES. [2024-11-10 17:47:59,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42620 conditions, 22084 events. 9790/22084 cut-off events. For 7425/7425 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 230934 event pairs, 3382 based on Foata normal form. 219/21159 useless extension candidates. Maximal degree in co-relation 42609. Up to 6462 conditions per place. [2024-11-10 17:47:59,750 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 93 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2024-11-10 17:47:59,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 614 flow [2024-11-10 17:47:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 17:47:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 17:47:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 321 transitions. [2024-11-10 17:47:59,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2024-11-10 17:47:59,755 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 194 flow. Second operand 6 states and 321 transitions. [2024-11-10 17:47:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 614 flow [2024-11-10 17:47:59,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:59,762 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 234 flow [2024-11-10 17:47:59,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-10 17:47:59,763 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-10 17:47:59,763 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 234 flow [2024-11-10 17:47:59,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 39.90909090909091) internal successors, (439), 11 states have internal predecessors, (439), 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) [2024-11-10 17:47:59,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:59,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:59,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 17:47:59,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 17:47:59,969 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:47:59,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 452941403, now seen corresponding path program 1 times [2024-11-10 17:47:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:59,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361337270] [2024-11-10 17:47:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361337270] [2024-11-10 17:48:00,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361337270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:00,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:00,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:48:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905515635] [2024-11-10 17:48:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:00,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:48:00,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:48:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:48:00,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2024-11-10 17:48:00,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-10 17:48:00,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:00,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2024-11-10 17:48:00,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:01,395 INFO L124 PetriNetUnfolderBase]: 8101/16689 cut-off events. [2024-11-10 17:48:01,395 INFO L125 PetriNetUnfolderBase]: For 8559/8559 co-relation queries the response was YES. [2024-11-10 17:48:01,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36961 conditions, 16689 events. 8101/16689 cut-off events. For 8559/8559 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 156600 event pairs, 1312 based on Foata normal form. 657/16694 useless extension candidates. Maximal degree in co-relation 36948. Up to 8799 conditions per place. [2024-11-10 17:48:01,474 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 51 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-11-10 17:48:01,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 406 flow [2024-11-10 17:48:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:48:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:48:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-11-10 17:48:01,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 17:48:01,475 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 234 flow. Second operand 3 states and 164 transitions. [2024-11-10 17:48:01,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 406 flow [2024-11-10 17:48:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:48:01,484 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 235 flow [2024-11-10 17:48:01,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-11-10 17:48:01,485 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-10 17:48:01,485 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 235 flow [2024-11-10 17:48:01,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-10 17:48:01,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:01,485 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-10 17:48:01,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 17:48:01,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-10 17:48:01,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash -225881712, now seen corresponding path program 1 times [2024-11-10 17:48:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853997460] [2024-11-10 17:48:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:48:01,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 17:48:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:48:01,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 17:48:01,506 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-11-10 17:48:01,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-11-10 17:48:01,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2024-11-10 17:48:01,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-10 17:48:01,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-11-10 17:48:01,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-11-10 17:48:01,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 17:48:01,507 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:01,508 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 17:48:01,508 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 17:48:01,531 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:48:01,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 106 transitions, 240 flow [2024-11-10 17:48:01,545 INFO L124 PetriNetUnfolderBase]: 25/137 cut-off events. [2024-11-10 17:48:01,546 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-10 17:48:01,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 137 events. 25/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 456 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 117. Up to 10 conditions per place. [2024-11-10 17:48:01,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 106 transitions, 240 flow [2024-11-10 17:48:01,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 106 transitions, 240 flow [2024-11-10 17:48:01,550 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:48:01,550 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=None, 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;@6c8e37a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:48:01,551 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-10 17:48:01,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:48:01,552 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:48:01,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:48:01,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:01,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:48:01,552 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-10 17:48:01,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 14614888, now seen corresponding path program 1 times [2024-11-10 17:48:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643983602] [2024-11-10 17:48:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:01,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643983602] [2024-11-10 17:48:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643983602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:01,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:48:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954396034] [2024-11-10 17:48:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:01,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:48:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:48:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:48:01,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 106 [2024-11-10 17:48:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 240 flow. Second operand has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 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) [2024-11-10 17:48:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:01,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 106 [2024-11-10 17:48:01,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:05,445 INFO L124 PetriNetUnfolderBase]: 30501/54068 cut-off events. [2024-11-10 17:48:05,445 INFO L125 PetriNetUnfolderBase]: For 4795/4795 co-relation queries the response was YES. [2024-11-10 17:48:05,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94224 conditions, 54068 events. 30501/54068 cut-off events. For 4795/4795 co-relation queries the response was YES. Maximal size of possible extension queue 2430. Compared 523920 event pairs, 25212 based on Foata normal form. 22446/72189 useless extension candidates. Maximal degree in co-relation 11052. Up to 38217 conditions per place. [2024-11-10 17:48:05,798 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 35 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2024-11-10 17:48:05,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 268 flow [2024-11-10 17:48:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:48:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:48:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2024-11-10 17:48:05,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7216981132075472 [2024-11-10 17:48:05,800 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 240 flow. Second operand 2 states and 153 transitions. [2024-11-10 17:48:05,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 268 flow [2024-11-10 17:48:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 262 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-10 17:48:05,805 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 192 flow [2024-11-10 17:48:05,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-10 17:48:05,805 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -7 predicate places. [2024-11-10 17:48:05,806 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 192 flow [2024-11-10 17:48:05,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 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) [2024-11-10 17:48:05,806 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:05,806 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:05,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 17:48:05,806 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-10 17:48:05,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1258388392, now seen corresponding path program 1 times [2024-11-10 17:48:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108219449] [2024-11-10 17:48:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:05,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108219449] [2024-11-10 17:48:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108219449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:05,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:05,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 17:48:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208316414] [2024-11-10 17:48:05,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:05,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:48:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:48:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:48:05,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 106 [2024-11-10 17:48:05,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2024-11-10 17:48:05,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:05,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 106 [2024-11-10 17:48:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:09,257 INFO L124 PetriNetUnfolderBase]: 30501/53381 cut-off events. [2024-11-10 17:48:09,258 INFO L125 PetriNetUnfolderBase]: For 2307/2307 co-relation queries the response was YES. [2024-11-10 17:48:09,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92803 conditions, 53381 events. 30501/53381 cut-off events. For 2307/2307 co-relation queries the response was YES. Maximal size of possible extension queue 2377. Compared 508751 event pairs, 25212 based on Foata normal form. 0/49743 useless extension candidates. Maximal degree in co-relation 92796. Up to 38216 conditions per place. [2024-11-10 17:48:09,712 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 34 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2024-11-10 17:48:09,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 254 flow [2024-11-10 17:48:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:48:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:48:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-10 17:48:09,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5754716981132075 [2024-11-10 17:48:09,713 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 192 flow. Second operand 3 states and 183 transitions. [2024-11-10 17:48:09,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 254 flow [2024-11-10 17:48:09,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:48:09,722 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 186 flow [2024-11-10 17:48:09,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-11-10 17:48:09,722 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -9 predicate places. [2024-11-10 17:48:09,722 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 186 flow [2024-11-10 17:48:09,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2024-11-10 17:48:09,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:09,723 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:09,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 17:48:09,723 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-10 17:48:09,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1258388393, now seen corresponding path program 1 times [2024-11-10 17:48:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614615883] [2024-11-10 17:48:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:09,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:09,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614615883] [2024-11-10 17:48:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614615883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:09,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:09,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:48:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387092514] [2024-11-10 17:48:09,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:09,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:48:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:48:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:48:09,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 106 [2024-11-10 17:48:09,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2024-11-10 17:48:09,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:09,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 106 [2024-11-10 17:48:09,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:15,634 INFO L124 PetriNetUnfolderBase]: 47594/89532 cut-off events. [2024-11-10 17:48:15,634 INFO L125 PetriNetUnfolderBase]: For 3183/3183 co-relation queries the response was YES. [2024-11-10 17:48:15,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151476 conditions, 89532 events. 47594/89532 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 3738. Compared 976974 event pairs, 28985 based on Foata normal form. 1200/85247 useless extension candidates. Maximal degree in co-relation 151468. Up to 43675 conditions per place. [2024-11-10 17:48:16,406 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 86 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2024-11-10 17:48:16,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 506 flow [2024-11-10 17:48:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:48:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:48:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 343 transitions. [2024-11-10 17:48:16,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6471698113207547 [2024-11-10 17:48:16,407 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 186 flow. Second operand 5 states and 343 transitions. [2024-11-10 17:48:16,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 506 flow [2024-11-10 17:48:16,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:48:16,416 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 212 flow [2024-11-10 17:48:16,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2024-11-10 17:48:16,417 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2024-11-10 17:48:16,417 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 212 flow [2024-11-10 17:48:16,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2024-11-10 17:48:16,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:16,417 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:16,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 17:48:16,418 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-10 17:48:16,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:16,418 INFO L85 PathProgramCache]: Analyzing trace with hash 828253441, now seen corresponding path program 1 times [2024-11-10 17:48:16,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:16,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888566958] [2024-11-10 17:48:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 17:48:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888566958] [2024-11-10 17:48:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888566958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:16,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:48:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141305849] [2024-11-10 17:48:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:16,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:48:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:48:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:48:16,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 106 [2024-11-10 17:48:16,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 51.6) internal successors, (258), 5 states have internal predecessors, (258), 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) [2024-11-10 17:48:16,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:16,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 106 [2024-11-10 17:48:16,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:24,251 INFO L124 PetriNetUnfolderBase]: 60832/116243 cut-off events. [2024-11-10 17:48:24,251 INFO L125 PetriNetUnfolderBase]: For 23879/23879 co-relation queries the response was YES. [2024-11-10 17:48:24,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210940 conditions, 116243 events. 60832/116243 cut-off events. For 23879/23879 co-relation queries the response was YES. Maximal size of possible extension queue 4500. Compared 1315761 event pairs, 37654 based on Foata normal form. 1539/110339 useless extension candidates. Maximal degree in co-relation 210930. Up to 56145 conditions per place. [2024-11-10 17:48:25,125 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 90 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-11-10 17:48:25,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 139 transitions, 566 flow [2024-11-10 17:48:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:48:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:48:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2024-11-10 17:48:25,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6433962264150943 [2024-11-10 17:48:25,127 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 212 flow. Second operand 5 states and 341 transitions. [2024-11-10 17:48:25,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 139 transitions, 566 flow [2024-11-10 17:48:25,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 565 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:48:25,139 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 238 flow [2024-11-10 17:48:25,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2024-11-10 17:48:25,139 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2024-11-10 17:48:25,139 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 238 flow [2024-11-10 17:48:25,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.6) internal successors, (258), 5 states have internal predecessors, (258), 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) [2024-11-10 17:48:25,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:25,140 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:25,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 17:48:25,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-10 17:48:25,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1307054013, now seen corresponding path program 1 times [2024-11-10 17:48:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:25,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905959436] [2024-11-10 17:48:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:25,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905959436] [2024-11-10 17:48:25,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905959436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:48:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119680072] [2024-11-10 17:48:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:48:25,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:48:25,232 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) [2024-11-10 17:48:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 17:48:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:25,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 17:48:25,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:48:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:25,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:48:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:25,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119680072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:48:25,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:48:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 17:48:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744387672] [2024-11-10 17:48:25,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:48:25,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 17:48:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 17:48:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-10 17:48:25,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 106 [2024-11-10 17:48:25,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 238 flow. Second operand has 11 states, 11 states have (on average 51.90909090909091) internal successors, (571), 11 states have internal predecessors, (571), 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) [2024-11-10 17:48:25,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:25,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 106 [2024-11-10 17:48:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand