./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 17:43:44,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 17:43:44,602 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 17:43:44,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 17:43:44,610 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 17:43:44,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 17:43:44,636 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 17:43:44,636 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 17:43:44,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 17:43:44,637 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 17:43:44,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 17:43:44,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 17:43:44,638 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 17:43:44,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 17:43:44,640 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 17:43:44,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 17:43:44,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 17:43:44,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 17:43:44,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 17:43:44,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 17:43:44,642 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 17:43:44,645 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 17:43:44,645 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 17:43:44,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 17:43:44,645 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 17:43:44,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 17:43:44,646 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 17:43:44,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 17:43:44,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 17:43:44,646 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:43:44,647 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 17:43:44,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 17:43:44,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 17:43:44,648 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 17:43:44,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 17:43:44,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 17:43:44,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 17:43:44,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2024-11-10 17:43:44,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 17:43:44,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 17:43:44,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 17:43:44,900 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 17:43:44,900 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 17:43:44,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-10 17:43:46,173 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 17:43:46,395 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 17:43:46,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-10 17:43:46,416 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/002420348/7ef85d9e490c47668d85f16c91d8c42f/FLAGf49cf8a1c [2024-11-10 17:43:46,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/002420348/7ef85d9e490c47668d85f16c91d8c42f [2024-11-10 17:43:46,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 17:43:46,430 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 17:43:46,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 17:43:46,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 17:43:46,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 17:43:46,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:46,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd584f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46, skipping insertion in model container [2024-11-10 17:43:46,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:46,478 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 17:43:46,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:43:46,889 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 17:43:46,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:43:46,994 INFO L204 MainTranslator]: Completed translation [2024-11-10 17:43:46,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46 WrapperNode [2024-11-10 17:43:46,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 17:43:46,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 17:43:46,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 17:43:46,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 17:43:47,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,039 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-11-10 17:43:47,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 17:43:47,040 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 17:43:47,040 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 17:43:47,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 17:43:47,050 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,070 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 2, 9]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 1 writes are split as follows [0, 1, 0]. [2024-11-10 17:43:47,071 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,076 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 17:43:47,092 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 17:43:47,092 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 17:43:47,092 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 17:43:47,093 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (1/1) ... [2024-11-10 17:43:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:43:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:47,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 17:43:47,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 17:43:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-10 17:43:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-10 17:43:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 17:43:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 17:43:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 17:43:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 17:43:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 17:43:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 17:43:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 17:43:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 17:43:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 17:43:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 17:43:47,180 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 17:43:47,300 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 17:43:47,302 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 17:43:47,480 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 17:43:47,480 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 17:43:47,576 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 17:43:47,576 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 17:43:47,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:43:47 BoogieIcfgContainer [2024-11-10 17:43:47,576 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 17:43:47,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 17:43:47,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 17:43:47,584 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 17:43:47,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:43:46" (1/3) ... [2024-11-10 17:43:47,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a20c772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:47, skipping insertion in model container [2024-11-10 17:43:47,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:46" (2/3) ... [2024-11-10 17:43:47,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a20c772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:47, skipping insertion in model container [2024-11-10 17:43:47,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:43:47" (3/3) ... [2024-11-10 17:43:47,588 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-11-10 17:43:47,603 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 17:43:47,604 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-10 17:43:47,604 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 17:43:47,655 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 17:43:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 102 flow [2024-11-10 17:43:47,713 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2024-11-10 17:43:47,713 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:43:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 5/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-11-10 17:43:47,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 44 transitions, 102 flow [2024-11-10 17:43:47,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 41 transitions, 94 flow [2024-11-10 17:43:47,727 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:43:47,733 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;@7212cbdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:43:47,734 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-10 17:43:47,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:43:47,739 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-10 17:43:47,739 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:43:47,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:47,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:47,743 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:47,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1101628008, now seen corresponding path program 1 times [2024-11-10 17:43:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:47,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458255738] [2024-11-10 17:43:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:48,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458255738] [2024-11-10 17:43:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458255738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:48,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:43:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906313160] [2024-11-10 17:43:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:48,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:43:48,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:43:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:43:48,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-11-10 17:43:48,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 94 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) [2024-11-10 17:43:48,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:48,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-11-10 17:43:48,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:48,271 INFO L124 PetriNetUnfolderBase]: 9/57 cut-off events. [2024-11-10 17:43:48,271 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:43:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 57 events. 9/57 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 146 event pairs, 2 based on Foata normal form. 4/53 useless extension candidates. Maximal degree in co-relation 77. Up to 20 conditions per place. [2024-11-10 17:43:48,274 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 16 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-10 17:43:48,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 122 flow [2024-11-10 17:43:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:43:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:43:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-10 17:43:48,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-11-10 17:43:48,288 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 94 flow. Second operand 4 states and 100 transitions. [2024-11-10 17:43:48,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 122 flow [2024-11-10 17:43:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 17:43:48,292 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 80 flow [2024-11-10 17:43:48,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-10 17:43:48,296 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-11-10 17:43:48,297 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 80 flow [2024-11-10 17:43:48,297 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) [2024-11-10 17:43:48,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:48,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:48,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 17:43:48,297 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:48,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 209270296, now seen corresponding path program 1 times [2024-11-10 17:43:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:48,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251716869] [2024-11-10 17:43:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251716869] [2024-11-10 17:43:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251716869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:48,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:48,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:43:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636940166] [2024-11-10 17:43:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:48,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:43:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:43:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:43:48,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2024-11-10 17:43:48,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:48,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:48,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2024-11-10 17:43:48,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:48,584 INFO L124 PetriNetUnfolderBase]: 14/74 cut-off events. [2024-11-10 17:43:48,585 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 17:43:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 74 events. 14/74 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 169 event pairs, 6 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 48. Up to 36 conditions per place. [2024-11-10 17:43:48,588 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 19 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-11-10 17:43:48,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 136 flow [2024-11-10 17:43:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:43:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:43:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-10 17:43:48,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-11-10 17:43:48,590 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 80 flow. Second operand 4 states and 105 transitions. [2024-11-10 17:43:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 136 flow [2024-11-10 17:43:48,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 17:43:48,592 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 97 flow [2024-11-10 17:43:48,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-10 17:43:48,594 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-11-10 17:43:48,595 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 97 flow [2024-11-10 17:43:48,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:48,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:48,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:48,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 17:43:48,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:48,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2103517721, now seen corresponding path program 1 times [2024-11-10 17:43:48,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:48,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824991324] [2024-11-10 17:43:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:48,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:48,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:48,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824991324] [2024-11-10 17:43:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824991324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:48,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:48,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:43:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417394104] [2024-11-10 17:43:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:48,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:43:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:43:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:43:48,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:48,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:48,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:48,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:48,691 INFO L124 PetriNetUnfolderBase]: 11/71 cut-off events. [2024-11-10 17:43:48,692 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-10 17:43:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 71 events. 11/71 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 169 event pairs, 6 based on Foata normal form. 2/64 useless extension candidates. Maximal degree in co-relation 44. Up to 33 conditions per place. [2024-11-10 17:43:48,692 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 19 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2024-11-10 17:43:48,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 137 flow [2024-11-10 17:43:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:43:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:43:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-11-10 17:43:48,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-11-10 17:43:48,694 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 97 flow. Second operand 3 states and 82 transitions. [2024-11-10 17:43:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 137 flow [2024-11-10 17:43:48,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:43:48,696 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 92 flow [2024-11-10 17:43:48,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-10 17:43:48,696 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-11-10 17:43:48,697 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 92 flow [2024-11-10 17:43:48,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:48,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:48,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:48,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 17:43:48,697 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:48,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 772724246, now seen corresponding path program 1 times [2024-11-10 17:43:48,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:48,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836084429] [2024-11-10 17:43:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836084429] [2024-11-10 17:43:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836084429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:43:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256305483] [2024-11-10 17:43:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:48,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:43:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:43:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:43:48,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-11-10 17:43:48,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 92 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) [2024-11-10 17:43:48,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:48,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-11-10 17:43:48,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:48,857 INFO L124 PetriNetUnfolderBase]: 13/76 cut-off events. [2024-11-10 17:43:48,858 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 17:43:48,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 76 events. 13/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 2 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 121. Up to 20 conditions per place. [2024-11-10 17:43:48,858 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-10 17:43:48,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 136 flow [2024-11-10 17:43:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:43:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:43:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-10 17:43:48,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-11-10 17:43:48,862 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 92 flow. Second operand 4 states and 98 transitions. [2024-11-10 17:43:48,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 136 flow [2024-11-10 17:43:48,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:43:48,864 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 95 flow [2024-11-10 17:43:48,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-11-10 17:43:48,864 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-11-10 17:43:48,865 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 95 flow [2024-11-10 17:43:48,865 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) [2024-11-10 17:43:48,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:48,865 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:48,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 17:43:48,866 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:48,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1815351970, now seen corresponding path program 1 times [2024-11-10 17:43:48,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409286471] [2024-11-10 17:43:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409286471] [2024-11-10 17:43:48,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409286471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:48,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:48,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:43:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243437907] [2024-11-10 17:43:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:48,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:43:48,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:43:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:43:49,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2024-11-10 17:43:49,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:49,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:49,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2024-11-10 17:43:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:49,067 INFO L124 PetriNetUnfolderBase]: 12/64 cut-off events. [2024-11-10 17:43:49,068 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 17:43:49,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 64 events. 12/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 5 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 110. Up to 30 conditions per place. [2024-11-10 17:43:49,069 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 19 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-10 17:43:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 145 flow [2024-11-10 17:43:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:43:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:43:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-10 17:43:49,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-11-10 17:43:49,072 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 95 flow. Second operand 4 states and 105 transitions. [2024-11-10 17:43:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 145 flow [2024-11-10 17:43:49,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 137 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 17:43:49,074 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 98 flow [2024-11-10 17:43:49,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-11-10 17:43:49,075 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-11-10 17:43:49,075 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 98 flow [2024-11-10 17:43:49,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:49,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:49,084 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:49,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 17:43:49,085 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:49,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 713017006, now seen corresponding path program 1 times [2024-11-10 17:43:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451096731] [2024-11-10 17:43:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:49,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451096731] [2024-11-10 17:43:49,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451096731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:49,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80019415] [2024-11-10 17:43:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:49,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:49,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 17:43:49,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 17:43:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:49,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 17:43:49,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:49,426 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 17:43:49,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 17:43:49,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 17:43:49,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-10 17:43:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:49,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80019415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:49,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:49,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2024-11-10 17:43:49,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673902875] [2024-11-10 17:43:49,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:49,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 17:43:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 17:43:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-10 17:43:50,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-11-10 17:43:50,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 98 flow. Second operand has 13 states, 13 states have (on average 19.23076923076923) internal successors, (250), 13 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:50,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:50,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-11-10 17:43:50,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:50,211 INFO L124 PetriNetUnfolderBase]: 30/129 cut-off events. [2024-11-10 17:43:50,212 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-10 17:43:50,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 129 events. 30/129 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 6 based on Foata normal form. 12/140 useless extension candidates. Maximal degree in co-relation 239. Up to 35 conditions per place. [2024-11-10 17:43:50,213 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 30 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-11-10 17:43:50,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 222 flow [2024-11-10 17:43:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 17:43:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 17:43:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-11-10 17:43:50,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5162337662337663 [2024-11-10 17:43:50,215 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 98 flow. Second operand 7 states and 159 transitions. [2024-11-10 17:43:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 222 flow [2024-11-10 17:43:50,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 17:43:50,217 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 152 flow [2024-11-10 17:43:50,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-11-10 17:43:50,218 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-11-10 17:43:50,218 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 152 flow [2024-11-10 17:43:50,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.23076923076923) internal successors, (250), 13 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:50,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:50,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:50,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 17:43:50,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 17:43:50,422 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:50,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1985418896, now seen corresponding path program 1 times [2024-11-10 17:43:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:50,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591056827] [2024-11-10 17:43:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:50,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:50,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591056827] [2024-11-10 17:43:50,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591056827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224499158] [2024-11-10 17:43:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:50,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:50,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 17:43:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 17:43:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:50,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 17:43:50,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:50,613 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 [2024-11-10 17:43:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:50,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:50,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224499158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:50,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:50,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-10 17:43:50,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407960341] [2024-11-10 17:43:50,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:50,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 17:43:50,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 17:43:50,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-10 17:43:50,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-11-10 17:43:50,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 152 flow. Second operand has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:50,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-11-10 17:43:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:51,007 INFO L124 PetriNetUnfolderBase]: 25/120 cut-off events. [2024-11-10 17:43:51,007 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-11-10 17:43:51,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 120 events. 25/120 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 4 based on Foata normal form. 6/124 useless extension candidates. Maximal degree in co-relation 249. Up to 29 conditions per place. [2024-11-10 17:43:51,008 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 26 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-11-10 17:43:51,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 250 flow [2024-11-10 17:43:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 17:43:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 17:43:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-11-10 17:43:51,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-11-10 17:43:51,010 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 152 flow. Second operand 7 states and 173 transitions. [2024-11-10 17:43:51,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 250 flow [2024-11-10 17:43:51,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 234 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-10 17:43:51,012 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 186 flow [2024-11-10 17:43:51,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2024-11-10 17:43:51,013 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-11-10 17:43:51,013 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 186 flow [2024-11-10 17:43:51,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:51,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:51,013 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] [2024-11-10 17:43:51,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 17:43:51,217 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 [2024-11-10 17:43:51,219 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:51,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1876413733, now seen corresponding path program 1 times [2024-11-10 17:43:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:51,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699404361] [2024-11-10 17:43:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:51,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:51,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699404361] [2024-11-10 17:43:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699404361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:51,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-10 17:43:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481388277] [2024-11-10 17:43:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:51,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 17:43:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 17:43:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 17:43:51,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-11-10 17:43:51,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:51,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:51,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-11-10 17:43:51,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:51,607 INFO L124 PetriNetUnfolderBase]: 24/133 cut-off events. [2024-11-10 17:43:51,608 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-10 17:43:51,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 133 events. 24/133 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 12 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 307. Up to 51 conditions per place. [2024-11-10 17:43:51,609 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 28 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2024-11-10 17:43:51,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 50 transitions, 285 flow [2024-11-10 17:43:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 17:43:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 17:43:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-11-10 17:43:51,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-11-10 17:43:51,610 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 186 flow. Second operand 10 states and 224 transitions. [2024-11-10 17:43:51,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 50 transitions, 285 flow [2024-11-10 17:43:51,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 271 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 17:43:51,613 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 220 flow [2024-11-10 17:43:51,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=220, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2024-11-10 17:43:51,613 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-11-10 17:43:51,613 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 220 flow [2024-11-10 17:43:51,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:51,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:51,614 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] [2024-11-10 17:43:51,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 17:43:51,614 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:51,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash -289329948, now seen corresponding path program 1 times [2024-11-10 17:43:51,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:51,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960528806] [2024-11-10 17:43:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:51,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:51,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:51,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960528806] [2024-11-10 17:43:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960528806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:43:51,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:43:51,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 17:43:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709348951] [2024-11-10 17:43:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:43:51,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:43:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:43:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:43:51,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:51,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:51,813 INFO L124 PetriNetUnfolderBase]: 21/119 cut-off events. [2024-11-10 17:43:51,814 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-11-10 17:43:51,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 119 events. 21/119 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 12 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 302. Up to 51 conditions per place. [2024-11-10 17:43:51,815 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2024-11-10 17:43:51,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 255 flow [2024-11-10 17:43:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 17:43:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 17:43:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-11-10 17:43:51,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-11-10 17:43:51,817 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 220 flow. Second operand 6 states and 151 transitions. [2024-11-10 17:43:51,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 255 flow [2024-11-10 17:43:51,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 42 transitions, 244 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-10 17:43:51,819 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 192 flow [2024-11-10 17:43:51,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2024-11-10 17:43:51,822 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-11-10 17:43:51,822 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 192 flow [2024-11-10 17:43:51,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:51,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:51,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:51,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 17:43:51,823 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:51,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1187234458, now seen corresponding path program 1 times [2024-11-10 17:43:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130220733] [2024-11-10 17:43:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:51,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130220733] [2024-11-10 17:43:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130220733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228249909] [2024-11-10 17:43:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:51,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:51,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:51,968 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) [2024-11-10 17:43:51,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 17:43:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:52,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 17:43:52,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:52,134 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 [2024-11-10 17:43:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:52,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:52,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228249909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:52,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:52,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-10 17:43:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230125866] [2024-11-10 17:43:52,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:52,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 17:43:52,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 17:43:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 17:43:52,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:52,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 192 flow. Second operand has 14 states, 14 states have (on average 24.142857142857142) internal successors, (338), 14 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:52,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:52,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:52,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:52,434 INFO L124 PetriNetUnfolderBase]: 18/114 cut-off events. [2024-11-10 17:43:52,435 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-10 17:43:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 114 events. 18/114 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 9 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 269. Up to 40 conditions per place. [2024-11-10 17:43:52,435 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-11-10 17:43:52,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 43 transitions, 253 flow [2024-11-10 17:43:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 17:43:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 17:43:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-11-10 17:43:52,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-11-10 17:43:52,437 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 192 flow. Second operand 7 states and 175 transitions. [2024-11-10 17:43:52,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 43 transitions, 253 flow [2024-11-10 17:43:52,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 243 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 17:43:52,438 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 197 flow [2024-11-10 17:43:52,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2024-11-10 17:43:52,439 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-11-10 17:43:52,439 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 197 flow [2024-11-10 17:43:52,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.142857142857142) internal successors, (338), 14 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:52,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:52,440 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:52,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 17:43:52,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:52,644 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:52,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1321194296, now seen corresponding path program 2 times [2024-11-10 17:43:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:52,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116484455] [2024-11-10 17:43:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116484455] [2024-11-10 17:43:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116484455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904866910] [2024-11-10 17:43:52,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 17:43:52,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:52,830 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) [2024-11-10 17:43:52,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 17:43:52,895 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 17:43:52,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:43:52,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 17:43:52,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:53,057 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 [2024-11-10 17:43:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:53,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:53,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904866910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:53,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-10 17:43:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473551110] [2024-11-10 17:43:53,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:53,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 17:43:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 17:43:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-10 17:43:53,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:53,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 197 flow. Second operand has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:53,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:53,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:53,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:53,504 INFO L124 PetriNetUnfolderBase]: 15/111 cut-off events. [2024-11-10 17:43:53,505 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-10 17:43:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 111 events. 15/111 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 157 event pairs, 6 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 267. Up to 31 conditions per place. [2024-11-10 17:43:53,505 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2024-11-10 17:43:53,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 264 flow [2024-11-10 17:43:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 17:43:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 17:43:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-11-10 17:43:53,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-11-10 17:43:53,507 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 197 flow. Second operand 8 states and 199 transitions. [2024-11-10 17:43:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 264 flow [2024-11-10 17:43:53,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 252 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-10 17:43:53,508 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 204 flow [2024-11-10 17:43:53,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=39} [2024-11-10 17:43:53,508 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-10 17:43:53,509 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 204 flow [2024-11-10 17:43:53,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:53,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:53,509 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:53,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 17:43:53,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:53,716 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:53,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 714837404, now seen corresponding path program 2 times [2024-11-10 17:43:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741818793] [2024-11-10 17:43:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:53,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741818793] [2024-11-10 17:43:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741818793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798014591] [2024-11-10 17:43:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 17:43:53,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:53,888 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) [2024-11-10 17:43:53,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 17:43:53,953 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 17:43:53,953 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:43:53,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 17:43:53,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:53,989 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 17:43:53,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 17:43:54,005 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 17:43:54,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-10 17:43:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:54,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798014591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:54,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-10 17:43:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245024212] [2024-11-10 17:43:54,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:54,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 17:43:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 17:43:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-10 17:43:54,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-11-10 17:43:54,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 39 transitions, 204 flow. Second operand has 22 states, 22 states have (on average 19.545454545454547) internal successors, (430), 22 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:54,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:54,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-11-10 17:43:54,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:55,230 INFO L124 PetriNetUnfolderBase]: 48/207 cut-off events. [2024-11-10 17:43:55,230 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-10 17:43:55,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 207 events. 48/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 306 event pairs, 6 based on Foata normal form. 8/214 useless extension candidates. Maximal degree in co-relation 606. Up to 38 conditions per place. [2024-11-10 17:43:55,231 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 46 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-11-10 17:43:55,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 488 flow [2024-11-10 17:43:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 17:43:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 17:43:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-11-10 17:43:55,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 17:43:55,233 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 204 flow. Second operand 11 states and 242 transitions. [2024-11-10 17:43:55,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 488 flow [2024-11-10 17:43:55,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 472 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-10 17:43:55,235 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 329 flow [2024-11-10 17:43:55,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=329, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2024-11-10 17:43:55,236 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-11-10 17:43:55,236 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 329 flow [2024-11-10 17:43:55,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.545454545454547) internal successors, (430), 22 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:55,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:55,237 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:55,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 17:43:55,437 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 [2024-11-10 17:43:55,438 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:55,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:55,438 INFO L85 PathProgramCache]: Analyzing trace with hash -236016418, now seen corresponding path program 2 times [2024-11-10 17:43:55,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:55,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124926301] [2024-11-10 17:43:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:55,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124926301] [2024-11-10 17:43:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124926301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239903111] [2024-11-10 17:43:55,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 17:43:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:55,607 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) [2024-11-10 17:43:55,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 17:43:55,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 17:43:55,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:43:55,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 17:43:55,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:55,696 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 17:43:55,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 17:43:55,713 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 17:43:55,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-10 17:43:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-10 17:43:56,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-10 17:43:56,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239903111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:56,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:56,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-11-10 17:43:56,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922599394] [2024-11-10 17:43:56,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:56,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 17:43:56,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 17:43:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-10 17:43:56,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-11-10 17:43:56,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 329 flow. Second operand has 16 states, 16 states have (on average 20.8125) internal successors, (333), 16 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:56,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:56,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-11-10 17:43:56,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:57,188 INFO L124 PetriNetUnfolderBase]: 55/207 cut-off events. [2024-11-10 17:43:57,188 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2024-11-10 17:43:57,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 207 events. 55/207 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 281 event pairs, 2 based on Foata normal form. 8/215 useless extension candidates. Maximal degree in co-relation 647. Up to 45 conditions per place. [2024-11-10 17:43:57,191 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 44 selfloop transitions, 24 changer transitions 0/77 dead transitions. [2024-11-10 17:43:57,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 77 transitions, 547 flow [2024-11-10 17:43:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 17:43:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 17:43:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 354 transitions. [2024-11-10 17:43:57,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-11-10 17:43:57,192 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 329 flow. Second operand 17 states and 354 transitions. [2024-11-10 17:43:57,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 77 transitions, 547 flow [2024-11-10 17:43:57,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 521 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 17:43:57,195 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 368 flow [2024-11-10 17:43:57,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=368, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2024-11-10 17:43:57,196 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-11-10 17:43:57,196 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 368 flow [2024-11-10 17:43:57,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.8125) internal successors, (333), 16 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:57,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:57,196 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:57,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 17:43:57,397 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 [2024-11-10 17:43:57,397 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:57,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -560360146, now seen corresponding path program 3 times [2024-11-10 17:43:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360197308] [2024-11-10 17:43:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360197308] [2024-11-10 17:43:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360197308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:57,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548197739] [2024-11-10 17:43:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 17:43:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:57,629 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) [2024-11-10 17:43:57,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 17:43:57,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 17:43:57,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:43:57,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 17:43:57,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:57,915 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 [2024-11-10 17:43:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:57,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548197739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:58,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-10 17:43:58,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107828512] [2024-11-10 17:43:58,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:58,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 17:43:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 17:43:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-10 17:43:58,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:58,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 52 transitions, 368 flow. Second operand has 20 states, 20 states have (on average 23.7) internal successors, (474), 20 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:58,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:58,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:58,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:58,442 INFO L124 PetriNetUnfolderBase]: 32/182 cut-off events. [2024-11-10 17:43:58,442 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-11-10 17:43:58,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 182 events. 32/182 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 248 event pairs, 15 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 555. Up to 62 conditions per place. [2024-11-10 17:43:58,443 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-11-10 17:43:58,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 453 flow [2024-11-10 17:43:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 17:43:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 17:43:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-11-10 17:43:58,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5631313131313131 [2024-11-10 17:43:58,444 INFO L175 Difference]: Start difference. First operand has 82 places, 52 transitions, 368 flow. Second operand 9 states and 223 transitions. [2024-11-10 17:43:58,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 453 flow [2024-11-10 17:43:58,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 391 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-11-10 17:43:58,447 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 325 flow [2024-11-10 17:43:58,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2024-11-10 17:43:58,449 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-11-10 17:43:58,450 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 325 flow [2024-11-10 17:43:58,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 23.7) internal successors, (474), 20 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:58,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:58,451 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:58,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 17:43:58,652 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 [2024-11-10 17:43:58,653 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:43:58,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:43:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash 863514756, now seen corresponding path program 4 times [2024-11-10 17:43:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:43:58,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462094240] [2024-11-10 17:43:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:43:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:43:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:43:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:43:58,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462094240] [2024-11-10 17:43:58,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462094240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:43:58,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698086038] [2024-11-10 17:43:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 17:43:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:43:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:43:58,871 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) [2024-11-10 17:43:58,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 17:43:58,946 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 17:43:58,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:43:58,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 17:43:58,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:43:59,191 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 [2024-11-10 17:43:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:59,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:43:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:43:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698086038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:43:59,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:43:59,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-10 17:43:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343486564] [2024-11-10 17:43:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:43:59,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 17:43:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:43:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 17:43:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-10 17:43:59,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:43:59,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 52 transitions, 325 flow. Second operand has 23 states, 23 states have (on average 23.695652173913043) internal successors, (545), 23 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:59,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:43:59,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:43:59,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:43:59,906 INFO L124 PetriNetUnfolderBase]: 29/177 cut-off events. [2024-11-10 17:43:59,906 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-11-10 17:43:59,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 177 events. 29/177 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 12 based on Foata normal form. 2/179 useless extension candidates. Maximal degree in co-relation 501. Up to 51 conditions per place. [2024-11-10 17:43:59,907 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-11-10 17:43:59,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 59 transitions, 419 flow [2024-11-10 17:43:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 17:43:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 17:43:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-11-10 17:43:59,908 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-11-10 17:43:59,908 INFO L175 Difference]: Start difference. First operand has 82 places, 52 transitions, 325 flow. Second operand 10 states and 247 transitions. [2024-11-10 17:43:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 59 transitions, 419 flow [2024-11-10 17:43:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 59 transitions, 399 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 17:43:59,911 INFO L231 Difference]: Finished difference. Result has 86 places, 52 transitions, 331 flow [2024-11-10 17:43:59,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=86, PETRI_TRANSITIONS=52} [2024-11-10 17:43:59,912 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-11-10 17:43:59,912 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 52 transitions, 331 flow [2024-11-10 17:43:59,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 23.695652173913043) internal successors, (545), 23 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:43:59,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:43:59,912 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:43:59,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 17:44:00,113 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 [2024-11-10 17:44:00,113 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:44:00,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:44:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1510333538, now seen corresponding path program 5 times [2024-11-10 17:44:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:44:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745155798] [2024-11-10 17:44:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:44:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:44:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:44:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:00,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:44:00,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745155798] [2024-11-10 17:44:00,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745155798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:44:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609879520] [2024-11-10 17:44:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 17:44:00,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:44:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:44:00,368 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) [2024-11-10 17:44:00,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 17:44:00,448 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 17:44:00,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:44:00,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 17:44:00,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:44:00,752 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 [2024-11-10 17:44:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:00,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:44:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:00,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609879520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:44:00,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:44:00,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-10 17:44:00,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568738037] [2024-11-10 17:44:00,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:44:00,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 17:44:00,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:44:00,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 17:44:00,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-10 17:44:01,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:44:01,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 52 transitions, 331 flow. Second operand has 26 states, 26 states have (on average 23.615384615384617) internal successors, (614), 26 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:01,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:44:01,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:44:01,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:44:01,721 INFO L124 PetriNetUnfolderBase]: 26/172 cut-off events. [2024-11-10 17:44:01,721 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-11-10 17:44:01,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 172 events. 26/172 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 9 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 485. Up to 40 conditions per place. [2024-11-10 17:44:01,723 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-11-10 17:44:01,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 60 transitions, 430 flow [2024-11-10 17:44:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 17:44:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 17:44:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-11-10 17:44:01,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5599173553719008 [2024-11-10 17:44:01,725 INFO L175 Difference]: Start difference. First operand has 86 places, 52 transitions, 331 flow. Second operand 11 states and 271 transitions. [2024-11-10 17:44:01,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 60 transitions, 430 flow [2024-11-10 17:44:01,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 60 transitions, 406 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-10 17:44:01,729 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 336 flow [2024-11-10 17:44:01,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=336, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2024-11-10 17:44:01,730 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-11-10 17:44:01,730 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 336 flow [2024-11-10 17:44:01,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.615384615384617) internal successors, (614), 26 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:01,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:44:01,731 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:44:01,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 17:44:01,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 17:44:01,935 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:44:01,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:44:01,935 INFO L85 PathProgramCache]: Analyzing trace with hash -623943868, now seen corresponding path program 6 times [2024-11-10 17:44:01,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:44:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620049836] [2024-11-10 17:44:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:44:01,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:44:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:44:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:44:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620049836] [2024-11-10 17:44:02,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620049836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:44:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132794817] [2024-11-10 17:44:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 17:44:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:44:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:44:02,229 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) [2024-11-10 17:44:02,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 17:44:02,334 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-10 17:44:02,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:44:02,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 17:44:02,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:44:02,706 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 [2024-11-10 17:44:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:02,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:44:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132794817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:44:02,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:44:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-10 17:44:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218933251] [2024-11-10 17:44:02,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:44:02,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-10 17:44:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:44:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-10 17:44:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-11-10 17:44:03,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2024-11-10 17:44:03,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 336 flow. Second operand has 29 states, 29 states have (on average 23.551724137931036) internal successors, (683), 29 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:03,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:44:03,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2024-11-10 17:44:03,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:44:03,764 INFO L124 PetriNetUnfolderBase]: 23/173 cut-off events. [2024-11-10 17:44:03,764 INFO L125 PetriNetUnfolderBase]: For 498/498 co-relation queries the response was YES. [2024-11-10 17:44:03,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 173 events. 23/173 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 210 event pairs, 6 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 485. Up to 31 conditions per place. [2024-11-10 17:44:03,765 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-11-10 17:44:03,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 61 transitions, 441 flow [2024-11-10 17:44:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 17:44:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 17:44:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-11-10 17:44:03,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5587121212121212 [2024-11-10 17:44:03,766 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 336 flow. Second operand 12 states and 295 transitions. [2024-11-10 17:44:03,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 61 transitions, 441 flow [2024-11-10 17:44:03,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 61 transitions, 413 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-11-10 17:44:03,772 INFO L231 Difference]: Finished difference. Result has 94 places, 52 transitions, 341 flow [2024-11-10 17:44:03,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=94, PETRI_TRANSITIONS=52} [2024-11-10 17:44:03,773 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-11-10 17:44:03,773 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 52 transitions, 341 flow [2024-11-10 17:44:03,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 23.551724137931036) internal successors, (683), 29 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:03,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:44:03,773 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:44:03,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 17:44:03,975 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,SelfDestructingSolverStorable16 [2024-11-10 17:44:03,975 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:44:03,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:44:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash 757600536, now seen corresponding path program 3 times [2024-11-10 17:44:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:44:03,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039880882] [2024-11-10 17:44:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:44:03,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:44:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:44:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 24 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:04,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:44:04,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039880882] [2024-11-10 17:44:04,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039880882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:44:04,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950419358] [2024-11-10 17:44:04,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 17:44:04,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:44:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:44:04,286 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) [2024-11-10 17:44:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 17:44:04,348 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 17:44:04,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 17:44:04,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 17:44:04,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:44:04,382 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 17:44:04,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 17:44:04,393 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 17:44:04,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-10 17:44:05,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 17:44:05,034 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 15 treesize of output 15 [2024-11-10 17:44:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-10 17:44:05,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:44:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-10 17:44:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950419358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:44:05,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:44:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2024-11-10 17:44:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727161642] [2024-11-10 17:44:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:44:05,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 17:44:05,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:44:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 17:44:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-10 17:44:06,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-11-10 17:44:06,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 52 transitions, 341 flow. Second operand has 26 states, 26 states have (on average 19.384615384615383) internal successors, (504), 26 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:06,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:44:06,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-11-10 17:44:06,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:44:07,720 INFO L124 PetriNetUnfolderBase]: 44/180 cut-off events. [2024-11-10 17:44:07,720 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2024-11-10 17:44:07,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 180 events. 44/180 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 171 event pairs, 2 based on Foata normal form. 2/182 useless extension candidates. Maximal degree in co-relation 509. Up to 44 conditions per place. [2024-11-10 17:44:07,721 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 53 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-11-10 17:44:07,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 80 transitions, 516 flow [2024-11-10 17:44:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-10 17:44:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-10 17:44:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 410 transitions. [2024-11-10 17:44:07,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-11-10 17:44:07,723 INFO L175 Difference]: Start difference. First operand has 94 places, 52 transitions, 341 flow. Second operand 21 states and 410 transitions. [2024-11-10 17:44:07,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 80 transitions, 516 flow [2024-11-10 17:44:07,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 416 flow, removed 8 selfloop flow, removed 30 redundant places. [2024-11-10 17:44:07,725 INFO L231 Difference]: Finished difference. Result has 83 places, 54 transitions, 257 flow [2024-11-10 17:44:07,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=257, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2024-11-10 17:44:07,726 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-10 17:44:07,726 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 257 flow [2024-11-10 17:44:07,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.384615384615383) internal successors, (504), 26 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:44:07,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:44:07,726 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:44:07,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 17:44:07,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 17:44:07,927 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 17:44:07,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:44:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1409213870, now seen corresponding path program 7 times [2024-11-10 17:44:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:44:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451057402] [2024-11-10 17:44:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:44:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:44:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:44:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 70 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:44:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451057402] [2024-11-10 17:44:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451057402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:44:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630218469] [2024-11-10 17:44:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 17:44:08,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:44:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:44:08,939 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) [2024-11-10 17:44:08,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 17:44:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:44:09,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-10 17:44:09,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:44:09,099 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 11 treesize of output 7 [2024-11-10 17:44:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 17:44:09,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,494 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-11-10 17:44:09,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-10 17:44:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 141 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:44:09,519 INFO L311 TraceCheckSpWp]: Computing backward predicates...