./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/weaver/popl20-more-sum-array-hom.wvr.c -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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:39:47,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:39:47,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:39:47,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:39:47,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:39:47,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:39:47,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:39:47,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:39:47,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:39:47,208 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:39:47,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:39:47,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:39:47,210 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:39:47,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:39:47,211 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:39:47,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:39:47,212 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:39:47,212 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:39:47,212 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:39:47,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:39:47,213 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:39:47,215 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:39:47,215 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:39:47,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:39:47,216 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:39:47,216 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:39:47,216 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:39:47,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:39:47,217 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:39:47,217 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:39:47,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:39:47,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:39:47,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:39:47,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:39:47,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:39:47,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:39:47,218 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:39:47,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:39:47,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:39:47,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:39:47,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:39:47,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:39:47,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-17 03:39:47,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:39:47,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:39:47,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:39:47,493 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:39:47,493 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:39:47,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-17 03:39:48,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:39:48,912 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:39:48,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-17 03:39:48,923 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40022be7/f51e77aa1b8c40eca13f641ef1bdb592/FLAG37d23b327 [2024-11-17 03:39:49,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40022be7/f51e77aa1b8c40eca13f641ef1bdb592 [2024-11-17 03:39:49,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:39:49,333 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:39:49,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:39:49,338 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:39:49,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:39:49,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dac4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49, skipping insertion in model container [2024-11-17 03:39:49,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,367 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:39:49,604 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:39:49,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:39:49,619 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:39:49,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:39:49,660 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:39:49,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49 WrapperNode [2024-11-17 03:39:49,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:39:49,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:39:49,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:39:49,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:39:49,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,701 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-17 03:39:49,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:39:49,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:39:49,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:39:49,702 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:39:49,711 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,713 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,725 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:39:49,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,732 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:39:49,741 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:39:49,741 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:39:49,741 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:39:49,741 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (1/1) ... [2024-11-17 03:39:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:39:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:49,785 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) [2024-11-17 03:39:49,804 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 [2024-11-17 03:39:49,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:39:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:39:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:39:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:39:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:39:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:39:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:39:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:39:49,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:39:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:39:49,880 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:39:49,982 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:39:49,984 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:39:50,176 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:39:50,176 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:39:50,291 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:39:50,291 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:39:50,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:39:50 BoogieIcfgContainer [2024-11-17 03:39:50,291 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:39:50,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:39:50,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:39:50,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:39:50,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:39:49" (1/3) ... [2024-11-17 03:39:50,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c723254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:50, skipping insertion in model container [2024-11-17 03:39:50,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:49" (2/3) ... [2024-11-17 03:39:50,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c723254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:50, skipping insertion in model container [2024-11-17 03:39:50,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:39:50" (3/3) ... [2024-11-17 03:39:50,296 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-17 03:39:50,307 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:39:50,307 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-17 03:39:50,307 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:39:50,348 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:39:50,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 127 flow [2024-11-17 03:39:50,396 INFO L124 PetriNetUnfolderBase]: 8/50 cut-off events. [2024-11-17 03:39:50,396 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:39:50,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 8/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-17 03:39:50,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 127 flow [2024-11-17 03:39:50,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 49 transitions, 116 flow [2024-11-17 03:39:50,407 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:39:50,411 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;@63229a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:39:50,411 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-17 03:39:50,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:39:50,414 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:39:50,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:39:50,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:50,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:39:50,415 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:50,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 10755773, now seen corresponding path program 1 times [2024-11-17 03:39:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:50,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115502712] [2024-11-17 03:39:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:50,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:50,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:50,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115502712] [2024-11-17 03:39:50,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115502712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:50,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:50,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:39:50,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668521372] [2024-11-17 03:39:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:50,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:39:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:39:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:39:50,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2024-11-17 03:39:50,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-17 03:39:50,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:50,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2024-11-17 03:39:50,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:50,779 INFO L124 PetriNetUnfolderBase]: 200/414 cut-off events. [2024-11-17 03:39:50,779 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-17 03:39:50,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 414 events. 200/414 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1886 event pairs, 124 based on Foata normal form. 77/421 useless extension candidates. Maximal degree in co-relation 649. Up to 293 conditions per place. [2024-11-17 03:39:50,785 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-11-17 03:39:50,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 148 flow [2024-11-17 03:39:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:39:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:39:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-17 03:39:50,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-11-17 03:39:50,799 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 116 flow. Second operand 3 states and 98 transitions. [2024-11-17 03:39:50,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 148 flow [2024-11-17 03:39:50,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:39:50,805 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 94 flow [2024-11-17 03:39:50,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-17 03:39:50,809 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2024-11-17 03:39:50,810 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 94 flow [2024-11-17 03:39:50,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-17 03:39:50,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:50,810 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:39:50,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:39:50,811 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:50,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 10755774, now seen corresponding path program 1 times [2024-11-17 03:39:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112719987] [2024-11-17 03:39:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:51,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112719987] [2024-11-17 03:39:51,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112719987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:51,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:51,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508277883] [2024-11-17 03:39:51,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:51,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:51,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2024-11-17 03:39:51,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:51,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:51,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2024-11-17 03:39:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:51,161 INFO L124 PetriNetUnfolderBase]: 201/419 cut-off events. [2024-11-17 03:39:51,161 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:39:51,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 419 events. 201/419 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1907 event pairs, 124 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 711. Up to 298 conditions per place. [2024-11-17 03:39:51,164 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 23 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-11-17 03:39:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 156 flow [2024-11-17 03:39:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:39:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:39:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-11-17 03:39:51,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-17 03:39:51,166 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 94 flow. Second operand 4 states and 120 transitions. [2024-11-17 03:39:51,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 156 flow [2024-11-17 03:39:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:51,168 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 117 flow [2024-11-17 03:39:51,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-17 03:39:51,169 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2024-11-17 03:39:51,169 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 117 flow [2024-11-17 03:39:51,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:51,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:51,170 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:39:51,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:39:51,171 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:51,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1696955042, now seen corresponding path program 1 times [2024-11-17 03:39:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:51,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314809772] [2024-11-17 03:39:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:51,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:51,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314809772] [2024-11-17 03:39:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314809772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:51,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976015840] [2024-11-17 03:39:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:51,562 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) [2024-11-17 03:39:51,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:39:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:51,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:39:51,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:51,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:39:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:51,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976015840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:51,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:39:51,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184854972] [2024-11-17 03:39:51,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:51,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:39:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:51,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:39:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:39:52,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-11-17 03:39:52,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-17 03:39:52,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:52,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-11-17 03:39:52,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:52,388 INFO L124 PetriNetUnfolderBase]: 202/423 cut-off events. [2024-11-17 03:39:52,389 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:39:52,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 423 events. 202/423 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1916 event pairs, 124 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 721. Up to 295 conditions per place. [2024-11-17 03:39:52,392 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 22 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2024-11-17 03:39:52,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 193 flow [2024-11-17 03:39:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:39:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:39:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-11-17 03:39:52,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-11-17 03:39:52,394 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 117 flow. Second operand 8 states and 210 transitions. [2024-11-17 03:39:52,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 193 flow [2024-11-17 03:39:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:52,396 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 142 flow [2024-11-17 03:39:52,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-17 03:39:52,397 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-11-17 03:39:52,397 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 142 flow [2024-11-17 03:39:52,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-17 03:39:52,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:52,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:52,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:52,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:52,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:52,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 637940020, now seen corresponding path program 1 times [2024-11-17 03:39:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812386306] [2024-11-17 03:39:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812386306] [2024-11-17 03:39:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812386306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:52,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:52,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571210864] [2024-11-17 03:39:52,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:52,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:52,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:52,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-17 03:39:52,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-17 03:39:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:52,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-17 03:39:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:52,702 INFO L124 PetriNetUnfolderBase]: 202/400 cut-off events. [2024-11-17 03:39:52,702 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-17 03:39:52,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 400 events. 202/400 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1709 event pairs, 124 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 698. Up to 294 conditions per place. [2024-11-17 03:39:52,704 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 25 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-17 03:39:52,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 194 flow [2024-11-17 03:39:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:39:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:39:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-17 03:39:52,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-17 03:39:52,706 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 142 flow. Second operand 4 states and 106 transitions. [2024-11-17 03:39:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 194 flow [2024-11-17 03:39:52,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 162 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-17 03:39:52,707 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 112 flow [2024-11-17 03:39:52,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-17 03:39:52,708 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-11-17 03:39:52,708 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 112 flow [2024-11-17 03:39:52,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-17 03:39:52,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:52,708 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:52,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:39:52,708 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:52,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash 637940021, now seen corresponding path program 1 times [2024-11-17 03:39:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:52,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389366560] [2024-11-17 03:39:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:52,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:52,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389366560] [2024-11-17 03:39:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389366560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:52,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:52,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:39:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452906952] [2024-11-17 03:39:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:52,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:39:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:39:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:39:52,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-11-17 03:39:52,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 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) [2024-11-17 03:39:52,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:52,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-11-17 03:39:52,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:52,873 INFO L124 PetriNetUnfolderBase]: 433/861 cut-off events. [2024-11-17 03:39:52,873 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-17 03:39:52,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 861 events. 433/861 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4616 event pairs, 229 based on Foata normal form. 26/814 useless extension candidates. Maximal degree in co-relation 888. Up to 386 conditions per place. [2024-11-17 03:39:52,876 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 55 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2024-11-17 03:39:52,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 302 flow [2024-11-17 03:39:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-11-17 03:39:52,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-11-17 03:39:52,878 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 112 flow. Second operand 6 states and 191 transitions. [2024-11-17 03:39:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 302 flow [2024-11-17 03:39:52,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:52,879 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 141 flow [2024-11-17 03:39:52,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-17 03:39:52,880 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-11-17 03:39:52,880 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 141 flow [2024-11-17 03:39:52,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 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) [2024-11-17 03:39:52,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:52,880 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:52,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:39:52,880 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:52,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2096885100, now seen corresponding path program 1 times [2024-11-17 03:39:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:52,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143203265] [2024-11-17 03:39:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:52,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:52,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143203265] [2024-11-17 03:39:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143203265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:52,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:52,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:39:52,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619810786] [2024-11-17 03:39:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:52,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:39:52,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-11-17 03:39:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-11-17 03:39:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-11-17 03:39:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:53,097 INFO L124 PetriNetUnfolderBase]: 410/842 cut-off events. [2024-11-17 03:39:53,097 INFO L125 PetriNetUnfolderBase]: For 243/274 co-relation queries the response was YES. [2024-11-17 03:39:53,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 842 events. 410/842 cut-off events. For 243/274 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4736 event pairs, 240 based on Foata normal form. 27/812 useless extension candidates. Maximal degree in co-relation 986. Up to 391 conditions per place. [2024-11-17 03:39:53,101 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 52 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2024-11-17 03:39:53,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 321 flow [2024-11-17 03:39:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-11-17 03:39:53,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911949685534591 [2024-11-17 03:39:53,102 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 141 flow. Second operand 6 states and 188 transitions. [2024-11-17 03:39:53,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 321 flow [2024-11-17 03:39:53,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:53,104 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 166 flow [2024-11-17 03:39:53,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-17 03:39:53,104 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2024-11-17 03:39:53,105 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 166 flow [2024-11-17 03:39:53,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-11-17 03:39:53,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:53,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:53,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:39:53,105 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:53,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1662587243, now seen corresponding path program 1 times [2024-11-17 03:39:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:53,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388564029] [2024-11-17 03:39:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:53,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388564029] [2024-11-17 03:39:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388564029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519031010] [2024-11-17 03:39:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:53,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:53,224 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) [2024-11-17 03:39:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:39:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:53,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:39:53,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:53,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:53,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:39:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519031010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:53,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:53,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-17 03:39:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751159722] [2024-11-17 03:39:53,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:53,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:39:53,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:39:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:53,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2024-11-17 03:39:53,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 166 flow. Second operand has 12 states, 12 states have (on average 24.416666666666668) internal successors, (293), 12 states have internal predecessors, (293), 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) [2024-11-17 03:39:53,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:53,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2024-11-17 03:39:53,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:53,751 INFO L124 PetriNetUnfolderBase]: 491/1031 cut-off events. [2024-11-17 03:39:53,751 INFO L125 PetriNetUnfolderBase]: For 491/545 co-relation queries the response was YES. [2024-11-17 03:39:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2234 conditions, 1031 events. 491/1031 cut-off events. For 491/545 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5962 event pairs, 246 based on Foata normal form. 0/925 useless extension candidates. Maximal degree in co-relation 1414. Up to 404 conditions per place. [2024-11-17 03:39:53,756 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 52 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2024-11-17 03:39:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 352 flow [2024-11-17 03:39:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-11-17 03:39:53,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-11-17 03:39:53,757 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 166 flow. Second operand 6 states and 196 transitions. [2024-11-17 03:39:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 352 flow [2024-11-17 03:39:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 345 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:53,759 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 190 flow [2024-11-17 03:39:53,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-11-17 03:39:53,760 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-11-17 03:39:53,760 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 190 flow [2024-11-17 03:39:53,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.416666666666668) internal successors, (293), 12 states have internal predecessors, (293), 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) [2024-11-17 03:39:53,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:53,761 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:53,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:39:53,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:39:53,965 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:53,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1118617224, now seen corresponding path program 1 times [2024-11-17 03:39:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:53,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913606470] [2024-11-17 03:39:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913606470] [2024-11-17 03:39:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913606470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:54,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:54,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:39:54,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570554232] [2024-11-17 03:39:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:54,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:39:54,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-17 03:39:54,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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) [2024-11-17 03:39:54,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:54,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-17 03:39:54,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:54,191 INFO L124 PetriNetUnfolderBase]: 595/1031 cut-off events. [2024-11-17 03:39:54,191 INFO L125 PetriNetUnfolderBase]: For 1058/1235 co-relation queries the response was YES. [2024-11-17 03:39:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 1031 events. 595/1031 cut-off events. For 1058/1235 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5240 event pairs, 306 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 1824. Up to 513 conditions per place. [2024-11-17 03:39:54,197 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 62 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-11-17 03:39:54,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 441 flow [2024-11-17 03:39:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:39:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:39:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-11-17 03:39:54,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.568733153638814 [2024-11-17 03:39:54,198 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 190 flow. Second operand 7 states and 211 transitions. [2024-11-17 03:39:54,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 441 flow [2024-11-17 03:39:54,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 424 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:54,201 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 214 flow [2024-11-17 03:39:54,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-11-17 03:39:54,201 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2024-11-17 03:39:54,202 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 214 flow [2024-11-17 03:39:54,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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) [2024-11-17 03:39:54,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:54,202 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:54,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:39:54,202 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:54,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash -995428364, now seen corresponding path program 1 times [2024-11-17 03:39:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:54,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77154226] [2024-11-17 03:39:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77154226] [2024-11-17 03:39:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77154226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114888116] [2024-11-17 03:39:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:54,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:54,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:54,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:39:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:54,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:39:54,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:54,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:54,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:39:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114888116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:54,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-17 03:39:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790875592] [2024-11-17 03:39:54,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:54,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:39:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:39:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:54,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2024-11-17 03:39:54,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 214 flow. Second operand has 12 states, 12 states have (on average 24.75) internal successors, (297), 12 states have internal predecessors, (297), 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) [2024-11-17 03:39:54,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:54,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2024-11-17 03:39:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:54,864 INFO L124 PetriNetUnfolderBase]: 625/1180 cut-off events. [2024-11-17 03:39:54,864 INFO L125 PetriNetUnfolderBase]: For 1005/1180 co-relation queries the response was YES. [2024-11-17 03:39:54,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3127 conditions, 1180 events. 625/1180 cut-off events. For 1005/1180 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6694 event pairs, 358 based on Foata normal form. 0/1078 useless extension candidates. Maximal degree in co-relation 2494. Up to 564 conditions per place. [2024-11-17 03:39:54,871 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 54 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2024-11-17 03:39:54,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 418 flow [2024-11-17 03:39:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-11-17 03:39:54,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.610062893081761 [2024-11-17 03:39:54,872 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 214 flow. Second operand 6 states and 194 transitions. [2024-11-17 03:39:54,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 418 flow [2024-11-17 03:39:54,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:54,875 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 240 flow [2024-11-17 03:39:54,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-11-17 03:39:54,876 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-11-17 03:39:54,876 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 240 flow [2024-11-17 03:39:54,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.75) internal successors, (297), 12 states have internal predecessors, (297), 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) [2024-11-17 03:39:54,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:54,876 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:54,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:39:55,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:55,081 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:55,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash -573326266, now seen corresponding path program 1 times [2024-11-17 03:39:55,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:55,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686394247] [2024-11-17 03:39:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:55,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:55,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:55,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686394247] [2024-11-17 03:39:55,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686394247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106095848] [2024-11-17 03:39:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:55,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:55,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:55,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:55,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:39:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:55,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:39:55,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:55,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106095848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:55,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:55,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:39:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103641808] [2024-11-17 03:39:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:55,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:39:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:39:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:39:55,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-17 03:39:55,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 240 flow. Second operand has 14 states, 14 states have (on average 22.785714285714285) internal successors, (319), 14 states have internal predecessors, (319), 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) [2024-11-17 03:39:55,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:55,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-17 03:39:55,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:55,672 INFO L124 PetriNetUnfolderBase]: 1556/2664 cut-off events. [2024-11-17 03:39:55,672 INFO L125 PetriNetUnfolderBase]: For 3105/3392 co-relation queries the response was YES. [2024-11-17 03:39:55,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 2664 events. 1556/2664 cut-off events. For 3105/3392 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16009 event pairs, 521 based on Foata normal form. 34/2590 useless extension candidates. Maximal degree in co-relation 6788. Up to 807 conditions per place. [2024-11-17 03:39:55,685 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 110 selfloop transitions, 19 changer transitions 0/142 dead transitions. [2024-11-17 03:39:55,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 855 flow [2024-11-17 03:39:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:39:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:39:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 354 transitions. [2024-11-17 03:39:55,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-17 03:39:55,687 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 240 flow. Second operand 12 states and 354 transitions. [2024-11-17 03:39:55,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 855 flow [2024-11-17 03:39:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 142 transitions, 828 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:55,691 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 322 flow [2024-11-17 03:39:55,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2024-11-17 03:39:55,692 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-11-17 03:39:55,692 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 322 flow [2024-11-17 03:39:55,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.785714285714285) internal successors, (319), 14 states have internal predecessors, (319), 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) [2024-11-17 03:39:55,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:55,693 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:55,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:39:55,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:55,894 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:55,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 819351256, now seen corresponding path program 1 times [2024-11-17 03:39:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:55,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166898444] [2024-11-17 03:39:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166898444] [2024-11-17 03:39:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166898444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:56,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:56,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:39:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419625372] [2024-11-17 03:39:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:56,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:39:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:39:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:39:56,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-17 03:39:56,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 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) [2024-11-17 03:39:56,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:56,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-17 03:39:56,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:56,411 INFO L124 PetriNetUnfolderBase]: 1356/2340 cut-off events. [2024-11-17 03:39:56,411 INFO L125 PetriNetUnfolderBase]: For 5070/5616 co-relation queries the response was YES. [2024-11-17 03:39:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 2340 events. 1356/2340 cut-off events. For 5070/5616 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14194 event pairs, 409 based on Foata normal form. 43/2345 useless extension candidates. Maximal degree in co-relation 5865. Up to 896 conditions per place. [2024-11-17 03:39:56,424 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 77 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-11-17 03:39:56,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 100 transitions, 737 flow [2024-11-17 03:39:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-11-17 03:39:56,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-11-17 03:39:56,425 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 322 flow. Second operand 6 states and 165 transitions. [2024-11-17 03:39:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 100 transitions, 737 flow [2024-11-17 03:39:56,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 704 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:56,430 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 323 flow [2024-11-17 03:39:56,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-11-17 03:39:56,431 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 31 predicate places. [2024-11-17 03:39:56,431 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 323 flow [2024-11-17 03:39:56,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 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) [2024-11-17 03:39:56,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:56,431 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:56,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:39:56,431 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:56,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1943168368, now seen corresponding path program 1 times [2024-11-17 03:39:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:56,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912241566] [2024-11-17 03:39:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:56,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:56,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912241566] [2024-11-17 03:39:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912241566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:56,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993801776] [2024-11-17 03:39:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:56,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:56,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:56,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:56,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:39:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:56,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:39:56,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:56,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993801776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:56,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:56,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-17 03:39:56,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105398439] [2024-11-17 03:39:56,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:56,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:39:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:39:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:39:56,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-17 03:39:56,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 323 flow. Second operand has 16 states, 16 states have (on average 22.9375) internal successors, (367), 16 states have internal predecessors, (367), 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) [2024-11-17 03:39:56,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:56,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-17 03:39:56,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:57,119 INFO L124 PetriNetUnfolderBase]: 1528/2536 cut-off events. [2024-11-17 03:39:57,119 INFO L125 PetriNetUnfolderBase]: For 5284/5617 co-relation queries the response was YES. [2024-11-17 03:39:57,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8409 conditions, 2536 events. 1528/2536 cut-off events. For 5284/5617 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14807 event pairs, 544 based on Foata normal form. 86/2564 useless extension candidates. Maximal degree in co-relation 7187. Up to 817 conditions per place. [2024-11-17 03:39:57,133 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 102 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-11-17 03:39:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 946 flow [2024-11-17 03:39:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:39:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:39:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 350 transitions. [2024-11-17 03:39:57,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550314465408805 [2024-11-17 03:39:57,135 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 323 flow. Second operand 12 states and 350 transitions. [2024-11-17 03:39:57,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 946 flow [2024-11-17 03:39:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 888 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:39:57,140 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 389 flow [2024-11-17 03:39:57,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=389, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-11-17 03:39:57,141 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2024-11-17 03:39:57,141 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 389 flow [2024-11-17 03:39:57,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.9375) internal successors, (367), 16 states have internal predecessors, (367), 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) [2024-11-17 03:39:57,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:57,141 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:57,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:57,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-17 03:39:57,342 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:57,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2093543846, now seen corresponding path program 2 times [2024-11-17 03:39:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:57,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810977177] [2024-11-17 03:39:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810977177] [2024-11-17 03:39:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810977177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141195166] [2024-11-17 03:39:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:57,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:57,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:57,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:39:57,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:57,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:57,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:39:57,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:57,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:39:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:57,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141195166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:57,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:39:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689103412] [2024-11-17 03:39:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:57,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:39:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:39:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:39:58,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-11-17 03:39:58,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 389 flow. Second operand has 21 states, 21 states have (on average 23.476190476190474) internal successors, (493), 21 states have internal predecessors, (493), 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) [2024-11-17 03:39:58,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:58,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-11-17 03:39:58,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:58,553 INFO L124 PetriNetUnfolderBase]: 1080/2069 cut-off events. [2024-11-17 03:39:58,553 INFO L125 PetriNetUnfolderBase]: For 4857/5153 co-relation queries the response was YES. [2024-11-17 03:39:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 2069 events. 1080/2069 cut-off events. For 4857/5153 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12956 event pairs, 513 based on Foata normal form. 37/1957 useless extension candidates. Maximal degree in co-relation 6118. Up to 712 conditions per place. [2024-11-17 03:39:58,587 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 78 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-11-17 03:39:58,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 730 flow [2024-11-17 03:39:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:39:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:39:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-11-17 03:39:58,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5943396226415094 [2024-11-17 03:39:58,588 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 389 flow. Second operand 8 states and 252 transitions. [2024-11-17 03:39:58,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 730 flow [2024-11-17 03:39:58,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 109 transitions, 702 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-17 03:39:58,594 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 410 flow [2024-11-17 03:39:58,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=410, PETRI_PLACES=94, PETRI_TRANSITIONS=70} [2024-11-17 03:39:58,595 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2024-11-17 03:39:58,595 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 410 flow [2024-11-17 03:39:58,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 23.476190476190474) internal successors, (493), 21 states have internal predecessors, (493), 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) [2024-11-17 03:39:58,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:58,596 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:58,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:58,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:58,797 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:58,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash 709870288, now seen corresponding path program 2 times [2024-11-17 03:39:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182124192] [2024-11-17 03:39:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:39:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182124192] [2024-11-17 03:39:59,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182124192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539872982] [2024-11-17 03:39:59,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:59,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:59,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:59,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:39:59,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:59,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:59,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:39:59,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:59,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:59,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:39:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:59,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539872982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:59,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:59,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:39:59,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955068451] [2024-11-17 03:39:59,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:59,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:39:59,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:39:59,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:39:59,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-17 03:39:59,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 70 transitions, 410 flow. Second operand has 21 states, 21 states have (on average 22.095238095238095) internal successors, (464), 21 states have internal predecessors, (464), 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) [2024-11-17 03:39:59,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:59,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-17 03:39:59,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:00,704 INFO L124 PetriNetUnfolderBase]: 2297/3651 cut-off events. [2024-11-17 03:40:00,704 INFO L125 PetriNetUnfolderBase]: For 9637/10231 co-relation queries the response was YES. [2024-11-17 03:40:00,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12945 conditions, 3651 events. 2297/3651 cut-off events. For 9637/10231 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21022 event pairs, 322 based on Foata normal form. 0/3611 useless extension candidates. Maximal degree in co-relation 11417. Up to 675 conditions per place. [2024-11-17 03:40:00,728 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 148 selfloop transitions, 24 changer transitions 0/185 dead transitions. [2024-11-17 03:40:00,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 185 transitions, 1354 flow [2024-11-17 03:40:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:40:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:40:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 419 transitions. [2024-11-17 03:40:00,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5646900269541779 [2024-11-17 03:40:00,730 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 410 flow. Second operand 14 states and 419 transitions. [2024-11-17 03:40:00,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 185 transitions, 1354 flow [2024-11-17 03:40:00,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 185 transitions, 1274 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-11-17 03:40:00,741 INFO L231 Difference]: Finished difference. Result has 102 places, 76 transitions, 485 flow [2024-11-17 03:40:00,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=485, PETRI_PLACES=102, PETRI_TRANSITIONS=76} [2024-11-17 03:40:00,742 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-11-17 03:40:00,742 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 76 transitions, 485 flow [2024-11-17 03:40:00,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.095238095238095) internal successors, (464), 21 states have internal predecessors, (464), 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) [2024-11-17 03:40:00,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:00,744 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:00,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:40:00,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:00,948 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:00,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1544983445, now seen corresponding path program 3 times [2024-11-17 03:40:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016156727] [2024-11-17 03:40:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:01,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016156727] [2024-11-17 03:40:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016156727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43893929] [2024-11-17 03:40:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:40:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:01,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:01,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:40:01,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:40:01,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:01,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:40:01,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:40:01,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:01,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-17 03:40:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:40:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43893929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:01,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-17 03:40:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118298195] [2024-11-17 03:40:01,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:01,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:40:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:40:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:40:01,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-17 03:40:01,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 76 transitions, 485 flow. Second operand has 20 states, 20 states have (on average 21.9) internal successors, (438), 20 states have internal predecessors, (438), 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) [2024-11-17 03:40:01,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:01,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-17 03:40:01,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:02,955 INFO L124 PetriNetUnfolderBase]: 4047/6417 cut-off events. [2024-11-17 03:40:02,955 INFO L125 PetriNetUnfolderBase]: For 18485/18734 co-relation queries the response was YES. [2024-11-17 03:40:02,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23700 conditions, 6417 events. 4047/6417 cut-off events. For 18485/18734 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 40110 event pairs, 701 based on Foata normal form. 74/6267 useless extension candidates. Maximal degree in co-relation 18747. Up to 1388 conditions per place. [2024-11-17 03:40:03,011 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 227 selfloop transitions, 38 changer transitions 0/279 dead transitions. [2024-11-17 03:40:03,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 279 transitions, 2270 flow [2024-11-17 03:40:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-17 03:40:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-17 03:40:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 569 transitions. [2024-11-17 03:40:03,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2024-11-17 03:40:03,014 INFO L175 Difference]: Start difference. First operand has 102 places, 76 transitions, 485 flow. Second operand 20 states and 569 transitions. [2024-11-17 03:40:03,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 279 transitions, 2270 flow [2024-11-17 03:40:03,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 279 transitions, 1989 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-11-17 03:40:03,031 INFO L231 Difference]: Finished difference. Result has 116 places, 90 transitions, 636 flow [2024-11-17 03:40:03,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=636, PETRI_PLACES=116, PETRI_TRANSITIONS=90} [2024-11-17 03:40:03,031 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-11-17 03:40:03,032 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 90 transitions, 636 flow [2024-11-17 03:40:03,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.9) internal successors, (438), 20 states have internal predecessors, (438), 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) [2024-11-17 03:40:03,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:03,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:03,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:40:03,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:40:03,237 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:03,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1264986637, now seen corresponding path program 1 times [2024-11-17 03:40:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80672810] [2024-11-17 03:40:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80672810] [2024-11-17 03:40:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80672810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:40:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:40:03,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:40:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487509919] [2024-11-17 03:40:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:03,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:40:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:40:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:40:03,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 53 [2024-11-17 03:40:03,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 90 transitions, 636 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2024-11-17 03:40:03,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:03,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 53 [2024-11-17 03:40:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:03,756 INFO L124 PetriNetUnfolderBase]: 2555/5127 cut-off events. [2024-11-17 03:40:03,757 INFO L125 PetriNetUnfolderBase]: For 15873/16260 co-relation queries the response was YES. [2024-11-17 03:40:03,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18699 conditions, 5127 events. 2555/5127 cut-off events. For 15873/16260 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 38777 event pairs, 563 based on Foata normal form. 12/4997 useless extension candidates. Maximal degree in co-relation 14764. Up to 2674 conditions per place. [2024-11-17 03:40:03,787 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 73 selfloop transitions, 9 changer transitions 10/118 dead transitions. [2024-11-17 03:40:03,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 118 transitions, 1014 flow [2024-11-17 03:40:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:40:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:40:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-17 03:40:03,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.710691823899371 [2024-11-17 03:40:03,788 INFO L175 Difference]: Start difference. First operand has 116 places, 90 transitions, 636 flow. Second operand 3 states and 113 transitions. [2024-11-17 03:40:03,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 118 transitions, 1014 flow [2024-11-17 03:40:03,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 967 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-17 03:40:03,812 INFO L231 Difference]: Finished difference. Result has 113 places, 89 transitions, 640 flow [2024-11-17 03:40:03,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=113, PETRI_TRANSITIONS=89} [2024-11-17 03:40:03,812 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 62 predicate places. [2024-11-17 03:40:03,813 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 89 transitions, 640 flow [2024-11-17 03:40:03,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2024-11-17 03:40:03,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:03,813 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:03,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:40:03,813 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:03,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash -615151428, now seen corresponding path program 1 times [2024-11-17 03:40:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695583418] [2024-11-17 03:40:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695583418] [2024-11-17 03:40:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695583418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44138175] [2024-11-17 03:40:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:03,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:03,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:03,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:03,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:40:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:03,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:40:03,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:04,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44138175] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:40:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-17 03:40:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832799685] [2024-11-17 03:40:04,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:04,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:40:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:40:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:40:04,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-17 03:40:04,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 89 transitions, 640 flow. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:04,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:04,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-17 03:40:04,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:05,262 INFO L124 PetriNetUnfolderBase]: 6868/10454 cut-off events. [2024-11-17 03:40:05,262 INFO L125 PetriNetUnfolderBase]: For 44235/45586 co-relation queries the response was YES. [2024-11-17 03:40:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41767 conditions, 10454 events. 6868/10454 cut-off events. For 44235/45586 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 68310 event pairs, 1804 based on Foata normal form. 93/10334 useless extension candidates. Maximal degree in co-relation 28928. Up to 4175 conditions per place. [2024-11-17 03:40:05,352 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 247 selfloop transitions, 42 changer transitions 0/304 dead transitions. [2024-11-17 03:40:05,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 304 transitions, 3081 flow [2024-11-17 03:40:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:40:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:40:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2024-11-17 03:40:05,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5420240137221269 [2024-11-17 03:40:05,354 INFO L175 Difference]: Start difference. First operand has 113 places, 89 transitions, 640 flow. Second operand 11 states and 316 transitions. [2024-11-17 03:40:05,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 304 transitions, 3081 flow [2024-11-17 03:40:05,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 304 transitions, 2710 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-11-17 03:40:05,416 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 844 flow [2024-11-17 03:40:05,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=844, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2024-11-17 03:40:05,417 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 58 predicate places. [2024-11-17 03:40:05,417 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 844 flow [2024-11-17 03:40:05,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:05,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:05,417 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:05,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:40:05,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:40:05,618 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:05,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2058048336, now seen corresponding path program 2 times [2024-11-17 03:40:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:05,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78608753] [2024-11-17 03:40:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:05,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78608753] [2024-11-17 03:40:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78608753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:05,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795259007] [2024-11-17 03:40:05,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:40:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:05,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:05,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:40:05,909 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:40:05,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:05,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:40:05,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:05,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795259007] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:06,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:40:06,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 16 [2024-11-17 03:40:06,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453765775] [2024-11-17 03:40:06,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:06,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:40:06,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:40:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:40:06,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-17 03:40:06,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 844 flow. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:06,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:06,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-17 03:40:06,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:07,453 INFO L124 PetriNetUnfolderBase]: 10095/15387 cut-off events. [2024-11-17 03:40:07,454 INFO L125 PetriNetUnfolderBase]: For 55776/57404 co-relation queries the response was YES. [2024-11-17 03:40:07,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60363 conditions, 15387 events. 10095/15387 cut-off events. For 55776/57404 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 106126 event pairs, 2426 based on Foata normal form. 90/15252 useless extension candidates. Maximal degree in co-relation 43789. Up to 5807 conditions per place. [2024-11-17 03:40:07,537 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 188 selfloop transitions, 82 changer transitions 0/285 dead transitions. [2024-11-17 03:40:07,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 285 transitions, 2705 flow [2024-11-17 03:40:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:40:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:40:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-11-17 03:40:07,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5542452830188679 [2024-11-17 03:40:07,540 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 844 flow. Second operand 8 states and 235 transitions. [2024-11-17 03:40:07,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 285 transitions, 2705 flow [2024-11-17 03:40:07,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 285 transitions, 2702 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:40:07,655 INFO L231 Difference]: Finished difference. Result has 118 places, 174 transitions, 1608 flow [2024-11-17 03:40:07,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=118, PETRI_TRANSITIONS=174} [2024-11-17 03:40:07,657 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-11-17 03:40:07,657 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 174 transitions, 1608 flow [2024-11-17 03:40:07,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:07,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:07,657 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:07,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:40:07,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:40:07,858 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:07,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1195368388, now seen corresponding path program 3 times [2024-11-17 03:40:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:07,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375899126] [2024-11-17 03:40:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:07,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:08,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375899126] [2024-11-17 03:40:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375899126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475535891] [2024-11-17 03:40:08,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:40:08,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:08,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:08,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:08,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:40:08,097 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:40:08,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:08,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:40:08,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:08,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475535891] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:40:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 16 [2024-11-17 03:40:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648424768] [2024-11-17 03:40:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:08,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:40:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:40:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:40:08,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-17 03:40:08,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 174 transitions, 1608 flow. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:08,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:08,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-17 03:40:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:10,215 INFO L124 PetriNetUnfolderBase]: 10517/16258 cut-off events. [2024-11-17 03:40:10,215 INFO L125 PetriNetUnfolderBase]: For 82922/84626 co-relation queries the response was YES. [2024-11-17 03:40:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75316 conditions, 16258 events. 10517/16258 cut-off events. For 82922/84626 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 114694 event pairs, 2684 based on Foata normal form. 132/16283 useless extension candidates. Maximal degree in co-relation 53076. Up to 6823 conditions per place. [2024-11-17 03:40:10,301 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 99 changer transitions 0/328 dead transitions. [2024-11-17 03:40:10,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 328 transitions, 3558 flow [2024-11-17 03:40:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:40:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:40:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-11-17 03:40:10,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-17 03:40:10,302 INFO L175 Difference]: Start difference. First operand has 118 places, 174 transitions, 1608 flow. Second operand 9 states and 265 transitions. [2024-11-17 03:40:10,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 328 transitions, 3558 flow [2024-11-17 03:40:10,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 328 transitions, 3543 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-17 03:40:10,570 INFO L231 Difference]: Finished difference. Result has 127 places, 202 transitions, 2259 flow [2024-11-17 03:40:10,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2259, PETRI_PLACES=127, PETRI_TRANSITIONS=202} [2024-11-17 03:40:10,571 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 76 predicate places. [2024-11-17 03:40:10,571 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 202 transitions, 2259 flow [2024-11-17 03:40:10,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:10,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:10,571 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:10,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:40:10,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:10,772 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:10,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2010440644, now seen corresponding path program 4 times [2024-11-17 03:40:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218568246] [2024-11-17 03:40:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:10,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218568246] [2024-11-17 03:40:10,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218568246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:10,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478594137] [2024-11-17 03:40:10,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:40:10,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:10,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:10,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:40:11,042 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:40:11,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:11,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:40:11,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:11,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478594137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:11,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-17 03:40:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839514710] [2024-11-17 03:40:11,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:11,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:40:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:40:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:40:11,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-17 03:40:11,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 202 transitions, 2259 flow. Second operand has 14 states, 14 states have (on average 20.071428571428573) internal successors, (281), 14 states have internal predecessors, (281), 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) [2024-11-17 03:40:11,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:11,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-17 03:40:11,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:15,340 INFO L124 PetriNetUnfolderBase]: 22119/32867 cut-off events. [2024-11-17 03:40:15,341 INFO L125 PetriNetUnfolderBase]: For 201045/201077 co-relation queries the response was YES. [2024-11-17 03:40:15,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169420 conditions, 32867 events. 22119/32867 cut-off events. For 201045/201077 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 227887 event pairs, 2629 based on Foata normal form. 154/33000 useless extension candidates. Maximal degree in co-relation 113619. Up to 7626 conditions per place. [2024-11-17 03:40:15,631 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 489 selfloop transitions, 414 changer transitions 0/908 dead transitions. [2024-11-17 03:40:15,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 908 transitions, 11119 flow [2024-11-17 03:40:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-17 03:40:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-17 03:40:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 718 transitions. [2024-11-17 03:40:15,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671437865972674 [2024-11-17 03:40:15,634 INFO L175 Difference]: Start difference. First operand has 127 places, 202 transitions, 2259 flow. Second operand 29 states and 718 transitions. [2024-11-17 03:40:15,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 908 transitions, 11119 flow [2024-11-17 03:40:17,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 908 transitions, 11028 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-17 03:40:17,251 INFO L231 Difference]: Finished difference. Result has 167 places, 525 transitions, 7377 flow [2024-11-17 03:40:17,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7377, PETRI_PLACES=167, PETRI_TRANSITIONS=525} [2024-11-17 03:40:17,251 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-11-17 03:40:17,252 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 525 transitions, 7377 flow [2024-11-17 03:40:17,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.071428571428573) internal successors, (281), 14 states have internal predecessors, (281), 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) [2024-11-17 03:40:17,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:17,252 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:17,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:40:17,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:17,453 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:17,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 570659700, now seen corresponding path program 5 times [2024-11-17 03:40:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:17,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579417556] [2024-11-17 03:40:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:17,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579417556] [2024-11-17 03:40:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579417556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088091135] [2024-11-17 03:40:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:40:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:17,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:17,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:40:17,657 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:40:17,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:17,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:40:17,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:17,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088091135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:17,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:17,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-17 03:40:17,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493573047] [2024-11-17 03:40:17,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:17,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:40:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:40:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:40:17,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-17 03:40:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 525 transitions, 7377 flow. Second operand has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 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) [2024-11-17 03:40:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-17 03:40:17,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:24,109 INFO L124 PetriNetUnfolderBase]: 26010/38916 cut-off events. [2024-11-17 03:40:24,109 INFO L125 PetriNetUnfolderBase]: For 339755/339835 co-relation queries the response was YES. [2024-11-17 03:40:24,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231680 conditions, 38916 events. 26010/38916 cut-off events. For 339755/339835 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 278811 event pairs, 2055 based on Foata normal form. 229/39143 useless extension candidates. Maximal degree in co-relation 187877. Up to 11428 conditions per place. [2024-11-17 03:40:24,609 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 394 selfloop transitions, 932 changer transitions 0/1331 dead transitions. [2024-11-17 03:40:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1331 transitions, 19342 flow [2024-11-17 03:40:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-17 03:40:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-17 03:40:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 698 transitions. [2024-11-17 03:40:24,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48777078965758214 [2024-11-17 03:40:24,612 INFO L175 Difference]: Start difference. First operand has 167 places, 525 transitions, 7377 flow. Second operand 27 states and 698 transitions. [2024-11-17 03:40:24,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1331 transitions, 19342 flow [2024-11-17 03:40:29,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1331 transitions, 19183 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-11-17 03:40:29,704 INFO L231 Difference]: Finished difference. Result has 205 places, 1063 transitions, 17719 flow [2024-11-17 03:40:29,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17719, PETRI_PLACES=205, PETRI_TRANSITIONS=1063} [2024-11-17 03:40:29,705 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2024-11-17 03:40:29,706 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 1063 transitions, 17719 flow [2024-11-17 03:40:29,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 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) [2024-11-17 03:40:29,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:29,706 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:29,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 03:40:29,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 03:40:29,911 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:29,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -839676510, now seen corresponding path program 6 times [2024-11-17 03:40:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319175064] [2024-11-17 03:40:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:30,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319175064] [2024-11-17 03:40:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319175064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264297753] [2024-11-17 03:40:30,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-17 03:40:30,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:30,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:30,139 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:30,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:40:30,243 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-17 03:40:30,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:30,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:40:30,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:30,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264297753] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:40:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2024-11-17 03:40:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289368662] [2024-11-17 03:40:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:30,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:40:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:40:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:40:30,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-17 03:40:30,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 1063 transitions, 17719 flow. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:30,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:30,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-17 03:40:30,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:35,067 INFO L124 PetriNetUnfolderBase]: 14230/22987 cut-off events. [2024-11-17 03:40:35,067 INFO L125 PetriNetUnfolderBase]: For 282364/284399 co-relation queries the response was YES. [2024-11-17 03:40:35,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153900 conditions, 22987 events. 14230/22987 cut-off events. For 282364/284399 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 178648 event pairs, 2561 based on Foata normal form. 159/22827 useless extension candidates. Maximal degree in co-relation 150159. Up to 8909 conditions per place. [2024-11-17 03:40:35,395 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 855 selfloop transitions, 336 changer transitions 0/1206 dead transitions. [2024-11-17 03:40:35,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1206 transitions, 21975 flow [2024-11-17 03:40:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:40:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:40:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-11-17 03:40:35,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5448113207547169 [2024-11-17 03:40:35,397 INFO L175 Difference]: Start difference. First operand has 205 places, 1063 transitions, 17719 flow. Second operand 8 states and 231 transitions. [2024-11-17 03:40:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1206 transitions, 21975 flow [2024-11-17 03:40:38,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1206 transitions, 21884 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-11-17 03:40:38,364 INFO L231 Difference]: Finished difference. Result has 210 places, 1073 transitions, 18860 flow [2024-11-17 03:40:38,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=17398, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18860, PETRI_PLACES=210, PETRI_TRANSITIONS=1073} [2024-11-17 03:40:38,365 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-11-17 03:40:38,366 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 1073 transitions, 18860 flow [2024-11-17 03:40:38,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2024-11-17 03:40:38,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:38,366 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:38,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-17 03:40:38,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:38,570 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:38,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -272218793, now seen corresponding path program 1 times [2024-11-17 03:40:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148167985] [2024-11-17 03:40:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148167985] [2024-11-17 03:40:38,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148167985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259991223] [2024-11-17 03:40:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:38,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:38,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:38,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:40:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:38,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:40:38,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:38,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259991223] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:40:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-17 03:40:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001257417] [2024-11-17 03:40:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:38,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:40:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:40:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:40:38,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-17 03:40:38,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 1073 transitions, 18860 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2024-11-17 03:40:38,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:38,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-17 03:40:38,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:43,308 INFO L124 PetriNetUnfolderBase]: 13494/21381 cut-off events. [2024-11-17 03:40:43,308 INFO L125 PetriNetUnfolderBase]: For 350356/355163 co-relation queries the response was YES. [2024-11-17 03:40:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158729 conditions, 21381 events. 13494/21381 cut-off events. For 350356/355163 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 159294 event pairs, 2422 based on Foata normal form. 1630/22125 useless extension candidates. Maximal degree in co-relation 153509. Up to 11414 conditions per place. [2024-11-17 03:40:43,539 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 786 selfloop transitions, 137 changer transitions 0/1083 dead transitions. [2024-11-17 03:40:43,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1083 transitions, 21448 flow [2024-11-17 03:40:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:40:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:40:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-11-17 03:40:43,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-11-17 03:40:43,540 INFO L175 Difference]: Start difference. First operand has 210 places, 1073 transitions, 18860 flow. Second operand 5 states and 145 transitions. [2024-11-17 03:40:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1083 transitions, 21448 flow [2024-11-17 03:40:45,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1083 transitions, 21219 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-17 03:40:45,454 INFO L231 Difference]: Finished difference. Result has 208 places, 948 transitions, 17129 flow [2024-11-17 03:40:45,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=16855, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=17129, PETRI_PLACES=208, PETRI_TRANSITIONS=948} [2024-11-17 03:40:45,455 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 157 predicate places. [2024-11-17 03:40:45,455 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 948 transitions, 17129 flow [2024-11-17 03:40:45,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2024-11-17 03:40:45,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:45,456 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:45,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-17 03:40:45,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:45,657 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:45,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1163893692, now seen corresponding path program 1 times [2024-11-17 03:40:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:45,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678285033] [2024-11-17 03:40:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:45,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:45,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678285033] [2024-11-17 03:40:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678285033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203336214] [2024-11-17 03:40:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:45,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:45,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:45,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:40:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:46,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:40:46,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:46,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:40:46,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:40:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:46,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:46,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203336214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:46,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:46,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-17 03:40:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725019437] [2024-11-17 03:40:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:46,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:40:46,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:40:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:40:46,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 53 [2024-11-17 03:40:46,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 948 transitions, 17129 flow. Second operand has 19 states, 19 states have (on average 27.473684210526315) internal successors, (522), 19 states have internal predecessors, (522), 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) [2024-11-17 03:40:46,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:46,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 53 [2024-11-17 03:40:46,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:50,020 INFO L124 PetriNetUnfolderBase]: 9866/18061 cut-off events. [2024-11-17 03:40:50,021 INFO L125 PetriNetUnfolderBase]: For 264262/267050 co-relation queries the response was YES. [2024-11-17 03:40:50,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132159 conditions, 18061 events. 9866/18061 cut-off events. For 264262/267050 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 157147 event pairs, 486 based on Foata normal form. 493/18107 useless extension candidates. Maximal degree in co-relation 128428. Up to 8491 conditions per place. [2024-11-17 03:40:50,232 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 861 selfloop transitions, 469 changer transitions 18/1518 dead transitions. [2024-11-17 03:40:50,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1518 transitions, 30172 flow [2024-11-17 03:40:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:40:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:40:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 305 transitions. [2024-11-17 03:40:50,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.639412997903564 [2024-11-17 03:40:50,234 INFO L175 Difference]: Start difference. First operand has 208 places, 948 transitions, 17129 flow. Second operand 9 states and 305 transitions. [2024-11-17 03:40:50,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1518 transitions, 30172 flow [2024-11-17 03:40:52,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1518 transitions, 29838 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:40:52,267 INFO L231 Difference]: Finished difference. Result has 216 places, 1192 transitions, 23888 flow [2024-11-17 03:40:52,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=16855, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23888, PETRI_PLACES=216, PETRI_TRANSITIONS=1192} [2024-11-17 03:40:52,268 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-11-17 03:40:52,268 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 1192 transitions, 23888 flow [2024-11-17 03:40:52,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.473684210526315) internal successors, (522), 19 states have internal predecessors, (522), 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) [2024-11-17 03:40:52,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:52,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:52,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:40:52,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-17 03:40:52,470 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:40:52,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 187299103, now seen corresponding path program 1 times [2024-11-17 03:40:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107665489] [2024-11-17 03:40:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107665489] [2024-11-17 03:40:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107665489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625387197] [2024-11-17 03:40:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:52,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:52,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:52,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:40:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:53,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-17 03:40:53,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:53,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:40:53,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:40:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:53,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625387197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:53,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2024-11-17 03:40:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384896689] [2024-11-17 03:40:53,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:53,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-17 03:40:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-17 03:40:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2024-11-17 03:40:54,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-11-17 03:40:54,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1192 transitions, 23888 flow. Second operand has 27 states, 27 states have (on average 24.555555555555557) internal successors, (663), 27 states have internal predecessors, (663), 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) [2024-11-17 03:40:54,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:54,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-11-17 03:40:54,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:01,202 INFO L124 PetriNetUnfolderBase]: 15681/27050 cut-off events. [2024-11-17 03:41:01,202 INFO L125 PetriNetUnfolderBase]: For 423637/426622 co-relation queries the response was YES. [2024-11-17 03:41:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201320 conditions, 27050 events. 15681/27050 cut-off events. For 423637/426622 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 232619 event pairs, 1020 based on Foata normal form. 237/26675 useless extension candidates. Maximal degree in co-relation 193715. Up to 15802 conditions per place. [2024-11-17 03:41:01,501 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 1194 selfloop transitions, 632 changer transitions 7/1899 dead transitions. [2024-11-17 03:41:01,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1899 transitions, 40557 flow [2024-11-17 03:41:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:41:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:41:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 423 transitions. [2024-11-17 03:41:01,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5700808625336927 [2024-11-17 03:41:01,503 INFO L175 Difference]: Start difference. First operand has 216 places, 1192 transitions, 23888 flow. Second operand 14 states and 423 transitions. [2024-11-17 03:41:01,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1899 transitions, 40557 flow [2024-11-17 03:41:06,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1899 transitions, 39847 flow, removed 282 selfloop flow, removed 3 redundant places. [2024-11-17 03:41:06,059 INFO L231 Difference]: Finished difference. Result has 235 places, 1565 transitions, 34363 flow [2024-11-17 03:41:06,060 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=23389, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=34363, PETRI_PLACES=235, PETRI_TRANSITIONS=1565} [2024-11-17 03:41:06,060 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2024-11-17 03:41:06,061 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 1565 transitions, 34363 flow [2024-11-17 03:41:06,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 24.555555555555557) internal successors, (663), 27 states have internal predecessors, (663), 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) [2024-11-17 03:41:06,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:06,061 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:06,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-17 03:41:06,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:06,265 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:41:06,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash 912256804, now seen corresponding path program 2 times [2024-11-17 03:41:06,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:06,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386114027] [2024-11-17 03:41:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:06,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386114027] [2024-11-17 03:41:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386114027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562997209] [2024-11-17 03:41:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:41:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:06,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:41:06,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:41:06,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:41:06,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:41:06,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:41:06,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:06,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:41:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:06,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:06,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:41:06,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-11-17 03:41:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:07,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562997209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:07,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:07,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-11-17 03:41:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991498575] [2024-11-17 03:41:07,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:07,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:41:07,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:41:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:41:07,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 53 [2024-11-17 03:41:07,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 1565 transitions, 34363 flow. Second operand has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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) [2024-11-17 03:41:07,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:07,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 53 [2024-11-17 03:41:07,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand