./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:35:00,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:35:00,458 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:35:00,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:35:00,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:35:00,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:35:00,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:35:00,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:35:00,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:35:00,479 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:35:00,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:35:00,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:35:00,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:35:00,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:35:00,480 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:35:00,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:35:00,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:35:00,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:35:00,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:35:00,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:35:00,482 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:35:00,482 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:35:00,482 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:35:00,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:35:00,483 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:35:00,483 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:35:00,483 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:35:00,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:35:00,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:35:00,484 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:35:00,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:35:00,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:35:00,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:35:00,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:00,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:35:00,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:35:00,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:35:00,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:35:00,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:35:00,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:35:00,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:35:00,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:35:00,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2024-11-17 03:35:00,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:35:00,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:35:00,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:35:00,717 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:35:00,718 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:35:00,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-17 03:35:02,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:35:02,331 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:35:02,332 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-17 03:35:02,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f994dacc/ed5d942d96b6470cb01c7b12649aa46b/FLAGc09462616 [2024-11-17 03:35:02,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f994dacc/ed5d942d96b6470cb01c7b12649aa46b [2024-11-17 03:35:02,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:35:02,750 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:35:02,752 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:02,752 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:35:02,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:35:02,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:02,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69623ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02, skipping insertion in model container [2024-11-17 03:35:02,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:02,776 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:35:02,930 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:35:02,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:02,950 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:35:02,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:02,996 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:35:02,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02 WrapperNode [2024-11-17 03:35:02,997 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:03,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:03,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:35:03,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:35:03,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,031 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 121 [2024-11-17 03:35:03,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:03,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:35:03,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:35:03,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:35:03,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,064 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:35:03,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,077 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,086 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:35:03,087 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:35:03,087 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:35:03,087 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:35:03,088 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (1/1) ... [2024-11-17 03:35:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:03,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:35:03,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:35:03,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:35:03,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:35:03,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:35:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:35:03,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:35:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:35:03,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:35:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:35:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:35:03,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:35:03,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:35:03,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:35:03,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:35:03,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:35:03,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:35:03,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:35:03,213 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:35:03,321 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:35:03,323 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:35:03,717 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:35:03,717 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:35:03,827 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:35:03,828 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:35:03,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:03 BoogieIcfgContainer [2024-11-17 03:35:03,829 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:35:03,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:35:03,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:35:03,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:35:03,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:35:02" (1/3) ... [2024-11-17 03:35:03,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38253bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:03, skipping insertion in model container [2024-11-17 03:35:03,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:02" (2/3) ... [2024-11-17 03:35:03,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38253bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:03, skipping insertion in model container [2024-11-17 03:35:03,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:03" (3/3) ... [2024-11-17 03:35:03,836 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2024-11-17 03:35:03,848 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:35:03,848 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-17 03:35:03,848 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:35:03,907 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:35:03,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 207 flow [2024-11-17 03:35:03,954 INFO L124 PetriNetUnfolderBase]: 9/90 cut-off events. [2024-11-17 03:35:03,956 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:35:03,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 90 events. 9/90 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 181 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2024-11-17 03:35:03,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 93 transitions, 207 flow [2024-11-17 03:35:03,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 89 transitions, 196 flow [2024-11-17 03:35:03,973 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:35:03,980 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;@3d8f7370, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:35:03,981 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-17 03:35:03,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:35:03,990 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-17 03:35:03,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:35:03,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:03,991 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:03,993 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:03,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 163478103, now seen corresponding path program 1 times [2024-11-17 03:35:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2996751] [2024-11-17 03:35:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2996751] [2024-11-17 03:35:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2996751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:04,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:04,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:35:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420091504] [2024-11-17 03:35:04,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:04,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:35:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:35:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:35:04,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 93 [2024-11-17 03:35:04,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:04,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:04,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 93 [2024-11-17 03:35:04,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:04,586 INFO L124 PetriNetUnfolderBase]: 1210/2394 cut-off events. [2024-11-17 03:35:04,586 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-17 03:35:04,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4189 conditions, 2394 events. 1210/2394 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16687 event pairs, 755 based on Foata normal form. 221/1903 useless extension candidates. Maximal degree in co-relation 3967. Up to 1649 conditions per place. [2024-11-17 03:35:04,606 INFO L140 encePairwiseOnDemand]: 86/93 looper letters, 42 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-17 03:35:04,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 272 flow [2024-11-17 03:35:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:35:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:35:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2024-11-17 03:35:04,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379928315412187 [2024-11-17 03:35:04,618 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 196 flow. Second operand 3 states and 178 transitions. [2024-11-17 03:35:04,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 272 flow [2024-11-17 03:35:04,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 260 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:04,625 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 176 flow [2024-11-17 03:35:04,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-17 03:35:04,629 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -7 predicate places. [2024-11-17 03:35:04,629 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 176 flow [2024-11-17 03:35:04,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:04,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:04,630 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:04,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:35:04,630 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:04,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash 163478104, now seen corresponding path program 1 times [2024-11-17 03:35:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964651672] [2024-11-17 03:35:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964651672] [2024-11-17 03:35:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964651672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:04,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:35:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737632460] [2024-11-17 03:35:04,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:04,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:35:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:35:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:35:05,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 93 [2024-11-17 03:35:05,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 45.142857142857146) internal successors, (316), 7 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:05,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:05,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 93 [2024-11-17 03:35:05,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:05,387 INFO L124 PetriNetUnfolderBase]: 1211/2399 cut-off events. [2024-11-17 03:35:05,387 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:35:05,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 2399 events. 1211/2399 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16618 event pairs, 755 based on Foata normal form. 0/1686 useless extension candidates. Maximal degree in co-relation 4067. Up to 1647 conditions per place. [2024-11-17 03:35:05,402 INFO L140 encePairwiseOnDemand]: 86/93 looper letters, 42 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-17 03:35:05,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 280 flow [2024-11-17 03:35:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 307 transitions. [2024-11-17 03:35:05,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5501792114695341 [2024-11-17 03:35:05,408 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 176 flow. Second operand 6 states and 307 transitions. [2024-11-17 03:35:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 280 flow [2024-11-17 03:35:05,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:05,412 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 197 flow [2024-11-17 03:35:05,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-17 03:35:05,413 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -3 predicate places. [2024-11-17 03:35:05,413 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 197 flow [2024-11-17 03:35:05,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.142857142857146) internal successors, (316), 7 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:05,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:05,414 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:05,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:35:05,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:05,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1811412882, now seen corresponding path program 1 times [2024-11-17 03:35:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:05,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357607712] [2024-11-17 03:35:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:05,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:05,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357607712] [2024-11-17 03:35:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357607712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:05,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:05,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:35:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530696997] [2024-11-17 03:35:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:05,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:05,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 93 [2024-11-17 03:35:05,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:05,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:05,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 93 [2024-11-17 03:35:05,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:05,870 INFO L124 PetriNetUnfolderBase]: 2008/3586 cut-off events. [2024-11-17 03:35:05,870 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-17 03:35:05,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6558 conditions, 3586 events. 2008/3586 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22752 event pairs, 1538 based on Foata normal form. 0/3089 useless extension candidates. Maximal degree in co-relation 6500. Up to 2836 conditions per place. [2024-11-17 03:35:05,886 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 49 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-17 03:35:05,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 287 flow [2024-11-17 03:35:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-11-17 03:35:05,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2024-11-17 03:35:05,888 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 197 flow. Second operand 4 states and 177 transitions. [2024-11-17 03:35:05,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 287 flow [2024-11-17 03:35:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 278 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:35:05,890 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 180 flow [2024-11-17 03:35:05,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-11-17 03:35:05,890 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -11 predicate places. [2024-11-17 03:35:05,891 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 180 flow [2024-11-17 03:35:05,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:05,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:05,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:05,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:35:05,891 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:05,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1811412881, now seen corresponding path program 1 times [2024-11-17 03:35:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:05,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981032375] [2024-11-17 03:35:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:05,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981032375] [2024-11-17 03:35:05,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981032375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:05,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:05,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:35:05,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263289185] [2024-11-17 03:35:05,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:05,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:05,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 93 [2024-11-17 03:35:05,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:05,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:05,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 93 [2024-11-17 03:35:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:06,145 INFO L124 PetriNetUnfolderBase]: 1210/2276 cut-off events. [2024-11-17 03:35:06,146 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:35:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 2276 events. 1210/2276 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15067 event pairs, 755 based on Foata normal form. 0/1684 useless extension candidates. Maximal degree in co-relation 3946. Up to 1646 conditions per place. [2024-11-17 03:35:06,155 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 44 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-17 03:35:06,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 270 flow [2024-11-17 03:35:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 220 transitions. [2024-11-17 03:35:06,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-11-17 03:35:06,157 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 180 flow. Second operand 4 states and 220 transitions. [2024-11-17 03:35:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 270 flow [2024-11-17 03:35:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 265 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:06,159 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 179 flow [2024-11-17 03:35:06,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-11-17 03:35:06,160 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-17 03:35:06,160 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 179 flow [2024-11-17 03:35:06,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:06,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:06,160 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:06,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:35:06,161 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:06,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -316267845, now seen corresponding path program 1 times [2024-11-17 03:35:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:06,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352484125] [2024-11-17 03:35:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:06,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352484125] [2024-11-17 03:35:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352484125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163779544] [2024-11-17 03:35:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:06,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:35:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:06,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:35:06,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:06,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:35:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:06,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163779544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:06,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:06,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-17 03:35:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380444800] [2024-11-17 03:35:06,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:06,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:35:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:35:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:35:07,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-17 03:35:07,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 179 flow. Second operand has 15 states, 15 states have (on average 44.333333333333336) internal successors, (665), 15 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:07,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:07,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-17 03:35:07,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:07,700 INFO L124 PetriNetUnfolderBase]: 1210/2275 cut-off events. [2024-11-17 03:35:07,700 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-17 03:35:07,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4000 conditions, 2275 events. 1210/2275 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15063 event pairs, 755 based on Foata normal form. 0/1684 useless extension candidates. Maximal degree in co-relation 3958. Up to 1646 conditions per place. [2024-11-17 03:35:07,712 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 38 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-11-17 03:35:07,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 271 flow [2024-11-17 03:35:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:35:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:35:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 384 transitions. [2024-11-17 03:35:07,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-17 03:35:07,714 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 179 flow. Second operand 8 states and 384 transitions. [2024-11-17 03:35:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 271 flow [2024-11-17 03:35:07,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 265 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:35:07,716 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 189 flow [2024-11-17 03:35:07,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=189, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-11-17 03:35:07,717 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-17 03:35:07,717 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 189 flow [2024-11-17 03:35:07,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 44.333333333333336) internal successors, (665), 15 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:07,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:07,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:07,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:35:07,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:07,923 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:07,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1009198098, now seen corresponding path program 1 times [2024-11-17 03:35:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:07,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025649234] [2024-11-17 03:35:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:07,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:08,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:08,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025649234] [2024-11-17 03:35:08,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025649234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:08,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275365393] [2024-11-17 03:35:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:08,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:08,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:08,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:35:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:08,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:35:08,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:08,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:35:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:08,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275365393] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:08,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:35:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-17 03:35:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341089531] [2024-11-17 03:35:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:08,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:35:08,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-11-17 03:35:08,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:08,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:08,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-11-17 03:35:08,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:08,454 INFO L124 PetriNetUnfolderBase]: 1404/2708 cut-off events. [2024-11-17 03:35:08,455 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:35:08,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2708 events. 1404/2708 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17929 event pairs, 938 based on Foata normal form. 0/2011 useless extension candidates. Maximal degree in co-relation 4691. Up to 1930 conditions per place. [2024-11-17 03:35:08,466 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 45 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-11-17 03:35:08,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 279 flow [2024-11-17 03:35:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-11-17 03:35:08,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2024-11-17 03:35:08,467 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 189 flow. Second operand 5 states and 246 transitions. [2024-11-17 03:35:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 279 flow [2024-11-17 03:35:08,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 261 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:08,469 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 171 flow [2024-11-17 03:35:08,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-11-17 03:35:08,469 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -11 predicate places. [2024-11-17 03:35:08,469 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 171 flow [2024-11-17 03:35:08,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:08,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:08,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:08,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:35:08,674 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,SelfDestructingSolverStorable5 [2024-11-17 03:35:08,675 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:08,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 487004109, now seen corresponding path program 1 times [2024-11-17 03:35:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128850566] [2024-11-17 03:35:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:08,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128850566] [2024-11-17 03:35:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128850566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:08,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:08,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:35:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399282112] [2024-11-17 03:35:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:08,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:35:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:35:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:35:08,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-17 03:35:08,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-17 03:35:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:08,940 INFO L124 PetriNetUnfolderBase]: 1209/2267 cut-off events. [2024-11-17 03:35:08,940 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-17 03:35:08,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 2267 events. 1209/2267 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14924 event pairs, 755 based on Foata normal form. 1/1684 useless extension candidates. Maximal degree in co-relation 3944. Up to 1655 conditions per place. [2024-11-17 03:35:08,953 INFO L140 encePairwiseOnDemand]: 91/93 looper letters, 47 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2024-11-17 03:35:08,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 267 flow [2024-11-17 03:35:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:35:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:35:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-17 03:35:08,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6200716845878136 [2024-11-17 03:35:08,956 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 171 flow. Second operand 3 states and 173 transitions. [2024-11-17 03:35:08,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 267 flow [2024-11-17 03:35:08,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 262 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:35:08,957 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 166 flow [2024-11-17 03:35:08,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-17 03:35:08,958 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -11 predicate places. [2024-11-17 03:35:08,958 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 166 flow [2024-11-17 03:35:08,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:08,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:08,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:08,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:35:08,961 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:08,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -390882655, now seen corresponding path program 1 times [2024-11-17 03:35:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918317255] [2024-11-17 03:35:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918317255] [2024-11-17 03:35:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918317255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424021964] [2024-11-17 03:35:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:09,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:09,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:09,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:35:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:09,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:35:09,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:09,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:35:09,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424021964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:09,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:35:09,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-17 03:35:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725438874] [2024-11-17 03:35:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:09,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:09,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:35:09,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:35:09,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:09,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:09,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:35:09,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:09,482 INFO L124 PetriNetUnfolderBase]: 2285/4209 cut-off events. [2024-11-17 03:35:09,483 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-17 03:35:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7511 conditions, 4209 events. 2285/4209 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28400 event pairs, 1238 based on Foata normal form. 128/3532 useless extension candidates. Maximal degree in co-relation 7506. Up to 2411 conditions per place. [2024-11-17 03:35:09,496 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 67 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2024-11-17 03:35:09,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 93 transitions, 350 flow [2024-11-17 03:35:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-17 03:35:09,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5779569892473119 [2024-11-17 03:35:09,497 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 166 flow. Second operand 4 states and 215 transitions. [2024-11-17 03:35:09,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 93 transitions, 350 flow [2024-11-17 03:35:09,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:35:09,499 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 187 flow [2024-11-17 03:35:09,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-11-17 03:35:09,500 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-17 03:35:09,500 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 187 flow [2024-11-17 03:35:09,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:09,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:09,500 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:09,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:35:09,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:09,705 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:09,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1197826780, now seen corresponding path program 1 times [2024-11-17 03:35:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458618656] [2024-11-17 03:35:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458618656] [2024-11-17 03:35:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458618656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634848980] [2024-11-17 03:35:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:09,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:09,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:09,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:09,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:35:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:10,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:35:10,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:10,117 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:35:10,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634848980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:10,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:35:10,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-17 03:35:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479632977] [2024-11-17 03:35:10,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:10,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:10,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:35:10,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 93 [2024-11-17 03:35:10,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:10,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:10,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 93 [2024-11-17 03:35:10,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:10,459 INFO L124 PetriNetUnfolderBase]: 2866/5280 cut-off events. [2024-11-17 03:35:10,459 INFO L125 PetriNetUnfolderBase]: For 385/493 co-relation queries the response was YES. [2024-11-17 03:35:10,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 5280 events. 2866/5280 cut-off events. For 385/493 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 37590 event pairs, 1608 based on Foata normal form. 258/4821 useless extension candidates. Maximal degree in co-relation 10206. Up to 3042 conditions per place. [2024-11-17 03:35:10,477 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 70 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-11-17 03:35:10,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 389 flow [2024-11-17 03:35:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2024-11-17 03:35:10,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-11-17 03:35:10,478 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 187 flow. Second operand 4 states and 214 transitions. [2024-11-17 03:35:10,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 389 flow [2024-11-17 03:35:10,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:10,481 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 205 flow [2024-11-17 03:35:10,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-11-17 03:35:10,482 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -7 predicate places. [2024-11-17 03:35:10,482 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 205 flow [2024-11-17 03:35:10,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:10,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:10,483 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:10,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:35:10,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:10,687 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:10,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2081244587, now seen corresponding path program 1 times [2024-11-17 03:35:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:10,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086862290] [2024-11-17 03:35:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:10,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:10,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086862290] [2024-11-17 03:35:10,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086862290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:10,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492046279] [2024-11-17 03:35:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:10,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:10,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:10,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:10,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:35:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:10,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:35:10,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:10,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492046279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:10,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:35:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463355737] [2024-11-17 03:35:10,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:10,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:35:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:35:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:35:11,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 93 [2024-11-17 03:35:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 205 flow. Second operand has 14 states, 14 states have (on average 43.142857142857146) internal successors, (604), 14 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 93 [2024-11-17 03:35:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:11,898 INFO L124 PetriNetUnfolderBase]: 4886/8485 cut-off events. [2024-11-17 03:35:11,898 INFO L125 PetriNetUnfolderBase]: For 939/1143 co-relation queries the response was YES. [2024-11-17 03:35:11,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17847 conditions, 8485 events. 4886/8485 cut-off events. For 939/1143 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 63556 event pairs, 2294 based on Foata normal form. 172/7529 useless extension candidates. Maximal degree in co-relation 17840. Up to 3361 conditions per place. [2024-11-17 03:35:11,953 INFO L140 encePairwiseOnDemand]: 81/93 looper letters, 140 selfloop transitions, 17 changer transitions 0/180 dead transitions. [2024-11-17 03:35:11,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 180 transitions, 806 flow [2024-11-17 03:35:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:35:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:35:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 584 transitions. [2024-11-17 03:35:11,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.570869990224829 [2024-11-17 03:35:11,958 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 205 flow. Second operand 11 states and 584 transitions. [2024-11-17 03:35:11,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 180 transitions, 806 flow [2024-11-17 03:35:11,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 180 transitions, 789 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:11,964 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 308 flow [2024-11-17 03:35:11,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=308, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2024-11-17 03:35:11,965 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2024-11-17 03:35:11,966 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 308 flow [2024-11-17 03:35:11,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 43.142857142857146) internal successors, (604), 14 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:11,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:11,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:11,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:35:12,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-17 03:35:12,171 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:12,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash -688473079, now seen corresponding path program 1 times [2024-11-17 03:35:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:12,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634889359] [2024-11-17 03:35:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:12,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:12,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634889359] [2024-11-17 03:35:12,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634889359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:12,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363294201] [2024-11-17 03:35:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:12,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:12,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:12,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:12,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:35:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:12,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:35:12,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:12,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:12,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363294201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:12,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:12,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:35:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184663295] [2024-11-17 03:35:12,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:12,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:35:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:35:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:35:12,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 93 [2024-11-17 03:35:12,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 43.285714285714285) internal successors, (606), 14 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:12,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:12,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 93 [2024-11-17 03:35:12,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:13,268 INFO L124 PetriNetUnfolderBase]: 4331/7465 cut-off events. [2024-11-17 03:35:13,269 INFO L125 PetriNetUnfolderBase]: For 3133/3323 co-relation queries the response was YES. [2024-11-17 03:35:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16474 conditions, 7465 events. 4331/7465 cut-off events. For 3133/3323 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 55198 event pairs, 2164 based on Foata normal form. 110/6759 useless extension candidates. Maximal degree in co-relation 16462. Up to 3373 conditions per place. [2024-11-17 03:35:13,300 INFO L140 encePairwiseOnDemand]: 81/93 looper letters, 132 selfloop transitions, 17 changer transitions 0/175 dead transitions. [2024-11-17 03:35:13,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 871 flow [2024-11-17 03:35:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:35:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:35:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 580 transitions. [2024-11-17 03:35:13,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5669599217986315 [2024-11-17 03:35:13,303 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 308 flow. Second operand 11 states and 580 transitions. [2024-11-17 03:35:13,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 871 flow [2024-11-17 03:35:13,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 859 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-17 03:35:13,308 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 375 flow [2024-11-17 03:35:13,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2024-11-17 03:35:13,308 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2024-11-17 03:35:13,308 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 375 flow [2024-11-17 03:35:13,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 43.285714285714285) internal successors, (606), 14 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:13,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:13,309 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:13,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:35:13,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:13,510 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:13,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1595620818, now seen corresponding path program 2 times [2024-11-17 03:35:13,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:13,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517080380] [2024-11-17 03:35:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:13,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:13,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517080380] [2024-11-17 03:35:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517080380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138443357] [2024-11-17 03:35:13,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:13,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:13,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:13,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:13,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:35:13,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:13,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:13,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:35:13,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:14,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:14,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:35:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138443357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:14,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:14,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-17 03:35:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700725501] [2024-11-17 03:35:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:14,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:35:14,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:35:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:35:14,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 93 [2024-11-17 03:35:14,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 375 flow. Second operand has 20 states, 20 states have (on average 37.15) internal successors, (743), 20 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:14,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 93 [2024-11-17 03:35:14,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:16,027 INFO L124 PetriNetUnfolderBase]: 6307/10454 cut-off events. [2024-11-17 03:35:16,028 INFO L125 PetriNetUnfolderBase]: For 4626/4887 co-relation queries the response was YES. [2024-11-17 03:35:16,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24574 conditions, 10454 events. 6307/10454 cut-off events. For 4626/4887 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 72721 event pairs, 2000 based on Foata normal form. 377/9802 useless extension candidates. Maximal degree in co-relation 24558. Up to 2210 conditions per place. [2024-11-17 03:35:16,157 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 159 selfloop transitions, 14 changer transitions 0/199 dead transitions. [2024-11-17 03:35:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 199 transitions, 1011 flow [2024-11-17 03:35:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:35:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:35:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 505 transitions. [2024-11-17 03:35:16,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543010752688172 [2024-11-17 03:35:16,162 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 375 flow. Second operand 10 states and 505 transitions. [2024-11-17 03:35:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 199 transitions, 1011 flow [2024-11-17 03:35:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 998 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:35:16,170 INFO L231 Difference]: Finished difference. Result has 116 places, 96 transitions, 425 flow [2024-11-17 03:35:16,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=116, PETRI_TRANSITIONS=96} [2024-11-17 03:35:16,172 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 26 predicate places. [2024-11-17 03:35:16,172 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 96 transitions, 425 flow [2024-11-17 03:35:16,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 37.15) internal successors, (743), 20 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:16,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:16,173 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:16,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:16,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:16,377 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:16,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1978903482, now seen corresponding path program 2 times [2024-11-17 03:35:16,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:16,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230189396] [2024-11-17 03:35:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:16,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230189396] [2024-11-17 03:35:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230189396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962353400] [2024-11-17 03:35:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:16,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:16,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:35:16,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:16,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:16,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:35:16,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:16,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:16,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:35:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:16,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962353400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:16,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:16,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-17 03:35:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967548500] [2024-11-17 03:35:16,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:16,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:35:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:35:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:35:17,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 93 [2024-11-17 03:35:17,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 96 transitions, 425 flow. Second operand has 20 states, 20 states have (on average 37.45) internal successors, (749), 20 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:17,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:17,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 93 [2024-11-17 03:35:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:18,959 INFO L124 PetriNetUnfolderBase]: 7888/12947 cut-off events. [2024-11-17 03:35:18,959 INFO L125 PetriNetUnfolderBase]: For 13022/13673 co-relation queries the response was YES. [2024-11-17 03:35:18,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31765 conditions, 12947 events. 7888/12947 cut-off events. For 13022/13673 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 91334 event pairs, 2327 based on Foata normal form. 477/12277 useless extension candidates. Maximal degree in co-relation 31746. Up to 2898 conditions per place. [2024-11-17 03:35:19,017 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 163 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-11-17 03:35:19,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1157 flow [2024-11-17 03:35:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:35:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:35:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 501 transitions. [2024-11-17 03:35:19,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5387096774193548 [2024-11-17 03:35:19,023 INFO L175 Difference]: Start difference. First operand has 116 places, 96 transitions, 425 flow. Second operand 10 states and 501 transitions. [2024-11-17 03:35:19,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1157 flow [2024-11-17 03:35:19,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 204 transitions, 1088 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:19,037 INFO L231 Difference]: Finished difference. Result has 121 places, 99 transitions, 451 flow [2024-11-17 03:35:19,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=451, PETRI_PLACES=121, PETRI_TRANSITIONS=99} [2024-11-17 03:35:19,038 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 31 predicate places. [2024-11-17 03:35:19,038 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 99 transitions, 451 flow [2024-11-17 03:35:19,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 37.45) internal successors, (749), 20 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:19,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:19,039 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:19,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:35:19,239 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,SelfDestructingSolverStorable12 [2024-11-17 03:35:19,239 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:19,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1870032324, now seen corresponding path program 3 times [2024-11-17 03:35:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:19,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338093746] [2024-11-17 03:35:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:19,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338093746] [2024-11-17 03:35:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338093746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496853523] [2024-11-17 03:35:19,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:35:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:19,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:19,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:35:19,537 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:35:19,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:19,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:35:19,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:19,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:19,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-17 03:35:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496853523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:20,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:20,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-17 03:35:20,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213303361] [2024-11-17 03:35:20,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:20,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:35:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:35:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:35:21,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 93 [2024-11-17 03:35:21,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 99 transitions, 451 flow. Second operand has 22 states, 22 states have (on average 35.5) internal successors, (781), 22 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:21,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:21,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 93 [2024-11-17 03:35:21,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:24,961 INFO L124 PetriNetUnfolderBase]: 23009/34646 cut-off events. [2024-11-17 03:35:24,961 INFO L125 PetriNetUnfolderBase]: For 30993/32079 co-relation queries the response was YES. [2024-11-17 03:35:25,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92139 conditions, 34646 events. 23009/34646 cut-off events. For 30993/32079 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 235842 event pairs, 4474 based on Foata normal form. 882/33114 useless extension candidates. Maximal degree in co-relation 92120. Up to 5498 conditions per place. [2024-11-17 03:35:25,217 INFO L140 encePairwiseOnDemand]: 79/93 looper letters, 392 selfloop transitions, 45 changer transitions 0/454 dead transitions. [2024-11-17 03:35:25,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 454 transitions, 2894 flow [2024-11-17 03:35:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:35:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:35:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1095 transitions. [2024-11-17 03:35:25,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4905913978494624 [2024-11-17 03:35:25,220 INFO L175 Difference]: Start difference. First operand has 121 places, 99 transitions, 451 flow. Second operand 24 states and 1095 transitions. [2024-11-17 03:35:25,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 454 transitions, 2894 flow [2024-11-17 03:35:25,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 454 transitions, 2701 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:25,274 INFO L231 Difference]: Finished difference. Result has 145 places, 122 transitions, 713 flow [2024-11-17 03:35:25,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=713, PETRI_PLACES=145, PETRI_TRANSITIONS=122} [2024-11-17 03:35:25,275 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 55 predicate places. [2024-11-17 03:35:25,275 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 122 transitions, 713 flow [2024-11-17 03:35:25,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.5) internal successors, (781), 22 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:25,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:25,275 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:25,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:35:25,479 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,SelfDestructingSolverStorable13 [2024-11-17 03:35:25,479 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:25,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -989582809, now seen corresponding path program 3 times [2024-11-17 03:35:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481562923] [2024-11-17 03:35:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:25,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:25,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481562923] [2024-11-17 03:35:25,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481562923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:25,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235699673] [2024-11-17 03:35:25,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:35:25,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:25,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:25,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:35:25,909 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:35:25,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:25,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:35:25,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:26,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:26,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-17 03:35:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:26,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235699673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:26,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:26,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-17 03:35:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518545553] [2024-11-17 03:35:26,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:26,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:35:26,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:35:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:35:27,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 93 [2024-11-17 03:35:27,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 122 transitions, 713 flow. Second operand has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:27,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:27,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 93 [2024-11-17 03:35:27,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:31,001 INFO L124 PetriNetUnfolderBase]: 22262/33341 cut-off events. [2024-11-17 03:35:31,001 INFO L125 PetriNetUnfolderBase]: For 60889/62173 co-relation queries the response was YES. [2024-11-17 03:35:31,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95443 conditions, 33341 events. 22262/33341 cut-off events. For 60889/62173 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 222527 event pairs, 4205 based on Foata normal form. 1103/32300 useless extension candidates. Maximal degree in co-relation 95417. Up to 5540 conditions per place. [2024-11-17 03:35:31,376 INFO L140 encePairwiseOnDemand]: 79/93 looper letters, 401 selfloop transitions, 45 changer transitions 0/471 dead transitions. [2024-11-17 03:35:31,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 471 transitions, 3493 flow [2024-11-17 03:35:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:35:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:35:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1085 transitions. [2024-11-17 03:35:31,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-11-17 03:35:31,379 INFO L175 Difference]: Start difference. First operand has 145 places, 122 transitions, 713 flow. Second operand 24 states and 1085 transitions. [2024-11-17 03:35:31,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 471 transitions, 3493 flow [2024-11-17 03:35:31,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 471 transitions, 3343 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-11-17 03:35:31,455 INFO L231 Difference]: Finished difference. Result has 164 places, 142 transitions, 915 flow [2024-11-17 03:35:31,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=915, PETRI_PLACES=164, PETRI_TRANSITIONS=142} [2024-11-17 03:35:31,455 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 74 predicate places. [2024-11-17 03:35:31,455 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 142 transitions, 915 flow [2024-11-17 03:35:31,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:31,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:31,456 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:31,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:31,660 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,SelfDestructingSolverStorable14 [2024-11-17 03:35:31,661 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:31,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1588746151, now seen corresponding path program 1 times [2024-11-17 03:35:31,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:31,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293932676] [2024-11-17 03:35:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:31,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:31,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293932676] [2024-11-17 03:35:31,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293932676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:31,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:31,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:35:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936403802] [2024-11-17 03:35:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:31,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:31,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:31,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-17 03:35:31,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 142 transitions, 915 flow. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:31,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:31,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-17 03:35:31,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:33,451 INFO L124 PetriNetUnfolderBase]: 9598/17127 cut-off events. [2024-11-17 03:35:33,451 INFO L125 PetriNetUnfolderBase]: For 35094/35696 co-relation queries the response was YES. [2024-11-17 03:35:33,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49914 conditions, 17127 events. 9598/17127 cut-off events. For 35094/35696 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 138899 event pairs, 5413 based on Foata normal form. 420/15645 useless extension candidates. Maximal degree in co-relation 49884. Up to 9840 conditions per place. [2024-11-17 03:35:33,566 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 105 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2024-11-17 03:35:33,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 162 transitions, 1241 flow [2024-11-17 03:35:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2024-11-17 03:35:33,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6263440860215054 [2024-11-17 03:35:33,569 INFO L175 Difference]: Start difference. First operand has 164 places, 142 transitions, 915 flow. Second operand 4 states and 233 transitions. [2024-11-17 03:35:33,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 162 transitions, 1241 flow [2024-11-17 03:35:33,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 162 transitions, 1183 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-11-17 03:35:33,637 INFO L231 Difference]: Finished difference. Result has 151 places, 131 transitions, 791 flow [2024-11-17 03:35:33,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=791, PETRI_PLACES=151, PETRI_TRANSITIONS=131} [2024-11-17 03:35:33,638 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 61 predicate places. [2024-11-17 03:35:33,638 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 131 transitions, 791 flow [2024-11-17 03:35:33,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:33,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:33,638 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:33,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:35:33,639 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:33,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 289380323, now seen corresponding path program 1 times [2024-11-17 03:35:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523074949] [2024-11-17 03:35:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:33,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523074949] [2024-11-17 03:35:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523074949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:35:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048889932] [2024-11-17 03:35:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:33,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:33,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-17 03:35:33,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 131 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:33,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:33,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-17 03:35:33,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:35,377 INFO L124 PetriNetUnfolderBase]: 8504/15559 cut-off events. [2024-11-17 03:35:35,381 INFO L125 PetriNetUnfolderBase]: For 28169/28313 co-relation queries the response was YES. [2024-11-17 03:35:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43544 conditions, 15559 events. 8504/15559 cut-off events. For 28169/28313 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 128255 event pairs, 4905 based on Foata normal form. 415/14325 useless extension candidates. Maximal degree in co-relation 43516. Up to 8922 conditions per place. [2024-11-17 03:35:35,553 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 94 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2024-11-17 03:35:35,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 145 transitions, 1050 flow [2024-11-17 03:35:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 232 transitions. [2024-11-17 03:35:35,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-11-17 03:35:35,555 INFO L175 Difference]: Start difference. First operand has 151 places, 131 transitions, 791 flow. Second operand 4 states and 232 transitions. [2024-11-17 03:35:35,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 145 transitions, 1050 flow [2024-11-17 03:35:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 1026 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-17 03:35:35,627 INFO L231 Difference]: Finished difference. Result has 145 places, 120 transitions, 701 flow [2024-11-17 03:35:35,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=701, PETRI_PLACES=145, PETRI_TRANSITIONS=120} [2024-11-17 03:35:35,628 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 55 predicate places. [2024-11-17 03:35:35,628 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 120 transitions, 701 flow [2024-11-17 03:35:35,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:35,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:35,629 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:35,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:35:35,629 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:35,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2071997418, now seen corresponding path program 1 times [2024-11-17 03:35:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:35,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820652136] [2024-11-17 03:35:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820652136] [2024-11-17 03:35:35,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820652136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:35,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976595404] [2024-11-17 03:35:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:35,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:35,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:35,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:35:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:35,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:35:35,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:36,100 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:35:36,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976595404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:36,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:35:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-11-17 03:35:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447950112] [2024-11-17 03:35:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:36,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:35:36,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:35:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:35:36,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2024-11-17 03:35:36,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 120 transitions, 701 flow. Second operand has 7 states, 7 states have (on average 44.57142857142857) internal successors, (312), 7 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:36,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:36,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2024-11-17 03:35:36,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:40,088 INFO L124 PetriNetUnfolderBase]: 18826/32776 cut-off events. [2024-11-17 03:35:40,091 INFO L125 PetriNetUnfolderBase]: For 56826/57144 co-relation queries the response was YES. [2024-11-17 03:35:40,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91643 conditions, 32776 events. 18826/32776 cut-off events. For 56826/57144 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 272639 event pairs, 4795 based on Foata normal form. 32/30155 useless extension candidates. Maximal degree in co-relation 91616. Up to 13421 conditions per place. [2024-11-17 03:35:40,403 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 214 selfloop transitions, 22 changer transitions 0/272 dead transitions. [2024-11-17 03:35:40,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 272 transitions, 1993 flow [2024-11-17 03:35:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:35:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:35:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 492 transitions. [2024-11-17 03:35:40,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5878136200716846 [2024-11-17 03:35:40,407 INFO L175 Difference]: Start difference. First operand has 145 places, 120 transitions, 701 flow. Second operand 9 states and 492 transitions. [2024-11-17 03:35:40,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 272 transitions, 1993 flow [2024-11-17 03:35:40,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 272 transitions, 1961 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:35:40,535 INFO L231 Difference]: Finished difference. Result has 156 places, 137 transitions, 868 flow [2024-11-17 03:35:40,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=156, PETRI_TRANSITIONS=137} [2024-11-17 03:35:40,535 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 66 predicate places. [2024-11-17 03:35:40,535 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 137 transitions, 868 flow [2024-11-17 03:35:40,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.57142857142857) internal successors, (312), 7 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:40,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:40,536 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:40,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:35:40,736 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 [2024-11-17 03:35:40,737 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:40,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 773737440, now seen corresponding path program 2 times [2024-11-17 03:35:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771964862] [2024-11-17 03:35:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:40,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771964862] [2024-11-17 03:35:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771964862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:40,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:40,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:35:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047775491] [2024-11-17 03:35:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:40,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:40,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-17 03:35:40,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 137 transitions, 868 flow. Second operand has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:40,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:40,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-17 03:35:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:45,004 INFO L124 PetriNetUnfolderBase]: 19941/38743 cut-off events. [2024-11-17 03:35:45,005 INFO L125 PetriNetUnfolderBase]: For 64443/64921 co-relation queries the response was YES. [2024-11-17 03:35:45,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114265 conditions, 38743 events. 19941/38743 cut-off events. For 64443/64921 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 377332 event pairs, 8825 based on Foata normal form. 14/34497 useless extension candidates. Maximal degree in co-relation 114232. Up to 18814 conditions per place. [2024-11-17 03:35:45,354 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 73 selfloop transitions, 8 changer transitions 46/190 dead transitions. [2024-11-17 03:35:45,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 190 transitions, 1427 flow [2024-11-17 03:35:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 329 transitions. [2024-11-17 03:35:45,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.589605734767025 [2024-11-17 03:35:45,356 INFO L175 Difference]: Start difference. First operand has 156 places, 137 transitions, 868 flow. Second operand 6 states and 329 transitions. [2024-11-17 03:35:45,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 190 transitions, 1427 flow [2024-11-17 03:35:45,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 190 transitions, 1411 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:45,533 INFO L231 Difference]: Finished difference. Result has 162 places, 139 transitions, 896 flow [2024-11-17 03:35:45,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=162, PETRI_TRANSITIONS=139} [2024-11-17 03:35:45,534 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 72 predicate places. [2024-11-17 03:35:45,534 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 139 transitions, 896 flow [2024-11-17 03:35:45,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:45,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:45,534 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:45,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:35:45,535 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:45,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1631355602, now seen corresponding path program 3 times [2024-11-17 03:35:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:45,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542910513] [2024-11-17 03:35:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542910513] [2024-11-17 03:35:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542910513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110912626] [2024-11-17 03:35:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:35:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:45,738 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:45,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:35:45,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:35:45,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:45,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:35:45,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:45,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:35:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:45,893 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:35:45,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110912626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:45,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:35:45,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-17 03:35:45,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576505842] [2024-11-17 03:35:45,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:45,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:35:45,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:35:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:35:46,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 93 [2024-11-17 03:35:46,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 139 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 45.5) internal successors, (364), 8 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:46,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:46,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 93 [2024-11-17 03:35:46,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:48,256 INFO L124 PetriNetUnfolderBase]: 10968/20290 cut-off events. [2024-11-17 03:35:48,257 INFO L125 PetriNetUnfolderBase]: For 40261/40502 co-relation queries the response was YES. [2024-11-17 03:35:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63433 conditions, 20290 events. 10968/20290 cut-off events. For 40261/40502 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 166562 event pairs, 3263 based on Foata normal form. 8/18683 useless extension candidates. Maximal degree in co-relation 63396. Up to 8084 conditions per place. [2024-11-17 03:35:48,445 INFO L140 encePairwiseOnDemand]: 82/93 looper letters, 181 selfloop transitions, 30 changer transitions 0/256 dead transitions. [2024-11-17 03:35:48,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 256 transitions, 2006 flow [2024-11-17 03:35:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:35:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:35:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 482 transitions. [2024-11-17 03:35:48,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5758661887694145 [2024-11-17 03:35:48,447 INFO L175 Difference]: Start difference. First operand has 162 places, 139 transitions, 896 flow. Second operand 9 states and 482 transitions. [2024-11-17 03:35:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 256 transitions, 2006 flow [2024-11-17 03:35:48,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 256 transitions, 1980 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-17 03:35:48,532 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 988 flow [2024-11-17 03:35:48,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=988, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-11-17 03:35:48,533 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 76 predicate places. [2024-11-17 03:35:48,533 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 988 flow [2024-11-17 03:35:48,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 45.5) internal successors, (364), 8 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:48,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:48,534 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:48,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:35:48,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:48,738 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:48,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1263736873, now seen corresponding path program 1 times [2024-11-17 03:35:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225666192] [2024-11-17 03:35:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:35:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225666192] [2024-11-17 03:35:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225666192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:35:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529900362] [2024-11-17 03:35:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:49,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:49,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:49,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 93 [2024-11-17 03:35:49,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 988 flow. Second operand has 5 states, 5 states have (on average 52.2) internal successors, (261), 5 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:49,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:49,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 93 [2024-11-17 03:35:49,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:51,784 INFO L124 PetriNetUnfolderBase]: 11127/21205 cut-off events. [2024-11-17 03:35:51,784 INFO L125 PetriNetUnfolderBase]: For 45330/46583 co-relation queries the response was YES. [2024-11-17 03:35:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66078 conditions, 21205 events. 11127/21205 cut-off events. For 45330/46583 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 186643 event pairs, 1867 based on Foata normal form. 316/19363 useless extension candidates. Maximal degree in co-relation 66041. Up to 8521 conditions per place. [2024-11-17 03:35:51,976 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 117 selfloop transitions, 6 changer transitions 39/227 dead transitions. [2024-11-17 03:35:51,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 227 transitions, 1931 flow [2024-11-17 03:35:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 306 transitions. [2024-11-17 03:35:51,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6580645161290323 [2024-11-17 03:35:51,978 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 988 flow. Second operand 5 states and 306 transitions. [2024-11-17 03:35:51,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 227 transitions, 1931 flow [2024-11-17 03:35:52,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 227 transitions, 1885 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:52,065 INFO L231 Difference]: Finished difference. Result has 166 places, 143 transitions, 981 flow [2024-11-17 03:35:52,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=981, PETRI_PLACES=166, PETRI_TRANSITIONS=143} [2024-11-17 03:35:52,066 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 76 predicate places. [2024-11-17 03:35:52,067 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 143 transitions, 981 flow [2024-11-17 03:35:52,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.2) internal successors, (261), 5 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:52,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:52,067 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:52,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-17 03:35:52,067 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:52,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1740745531, now seen corresponding path program 2 times [2024-11-17 03:35:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217124071] [2024-11-17 03:35:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217124071] [2024-11-17 03:35:52,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217124071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961276403] [2024-11-17 03:35:52,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:52,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:52,283 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:52,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:35:52,356 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:52,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:52,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:35:52,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:52,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:35:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:52,748 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:35:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961276403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:52,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:35:52,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-11-17 03:35:52,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831634682] [2024-11-17 03:35:52,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:52,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:35:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:35:52,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:35:52,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 93 [2024-11-17 03:35:52,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 143 transitions, 981 flow. Second operand has 8 states, 8 states have (on average 45.625) internal successors, (365), 8 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:52,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:52,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 93 [2024-11-17 03:35:52,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:55,988 INFO L124 PetriNetUnfolderBase]: 13366/24371 cut-off events. [2024-11-17 03:35:55,989 INFO L125 PetriNetUnfolderBase]: For 62740/63804 co-relation queries the response was YES. [2024-11-17 03:35:56,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81640 conditions, 24371 events. 13366/24371 cut-off events. For 62740/63804 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 204888 event pairs, 4667 based on Foata normal form. 353/23168 useless extension candidates. Maximal degree in co-relation 81601. Up to 10324 conditions per place. [2024-11-17 03:35:56,127 INFO L140 encePairwiseOnDemand]: 82/93 looper letters, 197 selfloop transitions, 26 changer transitions 0/270 dead transitions. [2024-11-17 03:35:56,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 270 transitions, 2289 flow [2024-11-17 03:35:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:35:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:35:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 477 transitions. [2024-11-17 03:35:56,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-11-17 03:35:56,130 INFO L175 Difference]: Start difference. First operand has 166 places, 143 transitions, 981 flow. Second operand 9 states and 477 transitions. [2024-11-17 03:35:56,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 270 transitions, 2289 flow [2024-11-17 03:35:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 270 transitions, 2285 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:35:56,228 INFO L231 Difference]: Finished difference. Result has 175 places, 146 transitions, 1067 flow [2024-11-17 03:35:56,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1067, PETRI_PLACES=175, PETRI_TRANSITIONS=146} [2024-11-17 03:35:56,229 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 85 predicate places. [2024-11-17 03:35:56,229 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 146 transitions, 1067 flow [2024-11-17 03:35:56,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 45.625) internal successors, (365), 8 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:56,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:56,229 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:56,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:35:56,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-17 03:35:56,434 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:35:56,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash 88934344, now seen corresponding path program 1 times [2024-11-17 03:35:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:56,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957853769] [2024-11-17 03:35:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:56,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:56,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957853769] [2024-11-17 03:35:56,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957853769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039807415] [2024-11-17 03:35:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:56,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:35:56,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:35:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:56,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:35:56,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:56,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:35:56,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:35:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:56,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:35:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039807415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:56,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:56,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 18 [2024-11-17 03:35:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547444674] [2024-11-17 03:35:56,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:56,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:35:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:35:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:35:57,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-11-17 03:35:57,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 146 transitions, 1067 flow. Second operand has 18 states, 18 states have (on average 42.72222222222222) internal successors, (769), 18 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:57,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:57,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-11-17 03:35:57,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand