./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2d1ca14c91be6e836759580a015ed2d4b9eb8ea9888f9f925ea579405b630f --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:35:44,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:35:44,463 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:35:44,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:35:44,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:35:44,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:35:44,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:35:44,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:35:44,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:35:44,482 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:35:44,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:35:44,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:35:44,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:35:44,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:35:44,483 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:35:44,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:35:44,484 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:35:44,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:35:44,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:35:44,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:35:44,485 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:35:44,486 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:35:44,486 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:35:44,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:35:44,487 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:35:44,487 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:35:44,487 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:35:44,487 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:35:44,487 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:35:44,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:35:44,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:35:44,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:35:44,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:35:44,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:35:44,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:35:44,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:35:44,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:35:44,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:35:44,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:35:44,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:35:44,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:35:44,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:35:44,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2d1ca14c91be6e836759580a015ed2d4b9eb8ea9888f9f925ea579405b630f [2024-11-20 17:35:44,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:35:44,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:35:44,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:35:44,743 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:35:44,743 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:35:44,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2024-11-20 17:35:46,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:35:46,258 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:35:46,259 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2024-11-20 17:35:46,270 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9d7e3bd/2e7bcd38b69e40a890e708fd7d15d74d/FLAG22ddfbcae [2024-11-20 17:35:46,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9d7e3bd/2e7bcd38b69e40a890e708fd7d15d74d [2024-11-20 17:35:46,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:35:46,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:35:46,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:35:46,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:35:46,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:35:46,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a29129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46, skipping insertion in model container [2024-11-20 17:35:46,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,337 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:35:46,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:35:46,671 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:35:46,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:35:46,753 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:35:46,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46 WrapperNode [2024-11-20 17:35:46,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:35:46,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:35:46,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:35:46,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:35:46,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,792 INFO L138 Inliner]: procedures = 252, calls = 52, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2024-11-20 17:35:46,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:35:46,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:35:46,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:35:46,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:35:46,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,804 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,815 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 2, 5]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 0, 5]. The 1 writes are split as follows [0, 0, 0, 1, 0]. [2024-11-20 17:35:46,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,825 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:35:46,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:35:46,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:35:46,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:35:46,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (1/1) ... [2024-11-20 17:35:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:35:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:46,863 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) [2024-11-20 17:35:46,865 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 [2024-11-20 17:35:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 17:35:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 17:35:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:35:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-20 17:35:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:35:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-20 17:35:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-20 17:35:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:35:46,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:35:46,929 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:35:47,075 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:35:47,077 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:35:47,240 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:35:47,241 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:35:47,342 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:35:47,342 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-20 17:35:47,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:47 BoogieIcfgContainer [2024-11-20 17:35:47,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:35:47,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:35:47,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:35:47,346 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:35:47,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:35:46" (1/3) ... [2024-11-20 17:35:47,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea5aec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:47, skipping insertion in model container [2024-11-20 17:35:47,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:46" (2/3) ... [2024-11-20 17:35:47,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea5aec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:47, skipping insertion in model container [2024-11-20 17:35:47,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:47" (3/3) ... [2024-11-20 17:35:47,348 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2024-11-20 17:35:47,360 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:35:47,361 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-20 17:35:47,361 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:35:47,389 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-20 17:35:47,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 68 transitions, 143 flow [2024-11-20 17:35:47,437 INFO L124 PetriNetUnfolderBase]: 15/103 cut-off events. [2024-11-20 17:35:47,437 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 17:35:47,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 103 events. 15/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2024-11-20 17:35:47,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 68 transitions, 143 flow [2024-11-20 17:35:47,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 68 transitions, 143 flow [2024-11-20 17:35:47,449 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:47,454 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;@5122d94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:47,454 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-20 17:35:47,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:47,457 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:35:47,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:47,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:47,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:47,458 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:47,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash 387454, now seen corresponding path program 1 times [2024-11-20 17:35:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:47,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329400073] [2024-11-20 17:35:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329400073] [2024-11-20 17:35:47,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329400073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:47,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:47,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:47,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663938447] [2024-11-20 17:35:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:47,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:47,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 68 [2024-11-20 17:35:47,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-20 17:35:47,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:47,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 68 [2024-11-20 17:35:47,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:47,885 INFO L124 PetriNetUnfolderBase]: 253/754 cut-off events. [2024-11-20 17:35:47,885 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 17:35:47,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 754 events. 253/754 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3959 event pairs, 224 based on Foata normal form. 121/851 useless extension candidates. Maximal degree in co-relation 1256. Up to 497 conditions per place. [2024-11-20 17:35:47,892 INFO L140 encePairwiseOnDemand]: 54/68 looper letters, 47 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2024-11-20 17:35:47,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 245 flow [2024-11-20 17:35:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-20 17:35:47,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-11-20 17:35:47,908 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 143 flow. Second operand 3 states and 125 transitions. [2024-11-20 17:35:47,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 245 flow [2024-11-20 17:35:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:35:47,916 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 119 flow [2024-11-20 17:35:47,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-11-20 17:35:47,920 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-20 17:35:47,920 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 119 flow [2024-11-20 17:35:47,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-20 17:35:47,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:47,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:47,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:35:47,921 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:47,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash 387455, now seen corresponding path program 1 times [2024-11-20 17:35:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:47,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299861715] [2024-11-20 17:35:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:48,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:48,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299861715] [2024-11-20 17:35:48,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299861715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884371085] [2024-11-20 17:35:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:48,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:48,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2024-11-20 17:35:48,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-20 17:35:48,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:48,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2024-11-20 17:35:48,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:48,310 INFO L124 PetriNetUnfolderBase]: 224/698 cut-off events. [2024-11-20 17:35:48,310 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-20 17:35:48,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 698 events. 224/698 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3681 event pairs, 120 based on Foata normal form. 1/662 useless extension candidates. Maximal degree in co-relation 1172. Up to 468 conditions per place. [2024-11-20 17:35:48,317 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 47 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-20 17:35:48,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 247 flow [2024-11-20 17:35:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-11-20 17:35:48,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5735294117647058 [2024-11-20 17:35:48,321 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 119 flow. Second operand 3 states and 117 transitions. [2024-11-20 17:35:48,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 247 flow [2024-11-20 17:35:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:35:48,325 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 125 flow [2024-11-20 17:35:48,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-11-20 17:35:48,326 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-20 17:35:48,326 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 125 flow [2024-11-20 17:35:48,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-20 17:35:48,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:48,326 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:35:48,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:35:48,326 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:48,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1351604769, now seen corresponding path program 1 times [2024-11-20 17:35:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403255838] [2024-11-20 17:35:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403255838] [2024-11-20 17:35:48,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403255838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:35:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78481509] [2024-11-20 17:35:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:48,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:48,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:48,442 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) [2024-11-20 17:35:48,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:35:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:48,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:35:48,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:35:48,591 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 [2024-11-20 17:35:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:48,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:35:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78481509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:35:48,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:35:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-20 17:35:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685036373] [2024-11-20 17:35:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:35:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:35:48,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:35:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:35:48,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 68 [2024-11-20 17:35:48,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2024-11-20 17:35:48,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:48,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 68 [2024-11-20 17:35:48,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:48,894 INFO L124 PetriNetUnfolderBase]: 42/127 cut-off events. [2024-11-20 17:35:48,894 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-20 17:35:48,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 127 events. 42/127 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 365 event pairs, 0 based on Foata normal form. 30/153 useless extension candidates. Maximal degree in co-relation 239. Up to 87 conditions per place. [2024-11-20 17:35:48,895 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 33 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-20 17:35:48,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 166 flow [2024-11-20 17:35:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:35:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:35:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-20 17:35:48,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44485294117647056 [2024-11-20 17:35:48,896 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 125 flow. Second operand 4 states and 121 transitions. [2024-11-20 17:35:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 166 flow [2024-11-20 17:35:48,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:35:48,897 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 62 flow [2024-11-20 17:35:48,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-11-20 17:35:48,898 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -27 predicate places. [2024-11-20 17:35:48,898 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 62 flow [2024-11-20 17:35:48,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2024-11-20 17:35:48,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:48,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-20 17:35:48,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:35:49,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:49,100 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:49,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1049924762, now seen corresponding path program 1 times [2024-11-20 17:35:49,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:49,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189851175] [2024-11-20 17:35:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:49,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:49,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:35:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:49,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:35:49,193 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:35:49,194 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-20 17:35:49,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-20 17:35:49,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:35:49,197 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 17:35:49,203 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:35:49,204 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:35:49,250 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:35:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 97 transitions, 210 flow [2024-11-20 17:35:49,312 INFO L124 PetriNetUnfolderBase]: 27/179 cut-off events. [2024-11-20 17:35:49,313 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:35:49,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 179 events. 27/179 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 749 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2024-11-20 17:35:49,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 97 transitions, 210 flow [2024-11-20 17:35:49,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 97 transitions, 210 flow [2024-11-20 17:35:49,321 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:49,327 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;@5122d94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:49,328 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-20 17:35:49,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:49,329 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:35:49,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:49,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:49,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:49,330 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:49,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 483775, now seen corresponding path program 1 times [2024-11-20 17:35:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581087795] [2024-11-20 17:35:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:49,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:49,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581087795] [2024-11-20 17:35:49,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581087795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:49,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:49,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676907729] [2024-11-20 17:35:49,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:49,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:49,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 97 [2024-11-20 17:35:49,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-20 17:35:49,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:49,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 97 [2024-11-20 17:35:49,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:51,111 INFO L124 PetriNetUnfolderBase]: 8123/15821 cut-off events. [2024-11-20 17:35:51,112 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-20 17:35:51,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28696 conditions, 15821 events. 8123/15821 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 125167 event pairs, 7210 based on Foata normal form. 2972/18286 useless extension candidates. Maximal degree in co-relation 21754. Up to 11384 conditions per place. [2024-11-20 17:35:51,194 INFO L140 encePairwiseOnDemand]: 77/97 looper letters, 77 selfloop transitions, 2 changer transitions 1/106 dead transitions. [2024-11-20 17:35:51,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 106 transitions, 388 flow [2024-11-20 17:35:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2024-11-20 17:35:51,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6460481099656358 [2024-11-20 17:35:51,196 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 210 flow. Second operand 3 states and 188 transitions. [2024-11-20 17:35:51,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 106 transitions, 388 flow [2024-11-20 17:35:51,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:35:51,199 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 174 flow [2024-11-20 17:35:51,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-11-20 17:35:51,200 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-20 17:35:51,200 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 174 flow [2024-11-20 17:35:51,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-20 17:35:51,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:51,201 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:51,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:35:51,201 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:51,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 483776, now seen corresponding path program 1 times [2024-11-20 17:35:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099266285] [2024-11-20 17:35:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099266285] [2024-11-20 17:35:51,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099266285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:51,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:51,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:51,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626577221] [2024-11-20 17:35:51,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:51,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:51,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:51,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:51,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 97 [2024-11-20 17:35:51,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:35:51,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:51,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 97 [2024-11-20 17:35:51,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:52,307 INFO L124 PetriNetUnfolderBase]: 7226/14592 cut-off events. [2024-11-20 17:35:52,307 INFO L125 PetriNetUnfolderBase]: For 186/199 co-relation queries the response was YES. [2024-11-20 17:35:52,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26304 conditions, 14592 events. 7226/14592 cut-off events. For 186/199 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 118260 event pairs, 5570 based on Foata normal form. 1/13961 useless extension candidates. Maximal degree in co-relation 24406. Up to 11355 conditions per place. [2024-11-20 17:35:52,372 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 64 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-20 17:35:52,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 338 flow [2024-11-20 17:35:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-20 17:35:52,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5326460481099656 [2024-11-20 17:35:52,374 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 174 flow. Second operand 3 states and 155 transitions. [2024-11-20 17:35:52,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 338 flow [2024-11-20 17:35:52,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 93 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:35:52,388 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 184 flow [2024-11-20 17:35:52,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-11-20 17:35:52,389 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-20 17:35:52,389 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 184 flow [2024-11-20 17:35:52,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:35:52,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:52,389 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:35:52,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:35:52,390 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:52,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 115548199, now seen corresponding path program 1 times [2024-11-20 17:35:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717678862] [2024-11-20 17:35:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:52,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717678862] [2024-11-20 17:35:52,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717678862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:35:52,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829539883] [2024-11-20 17:35:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:52,453 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) [2024-11-20 17:35:52,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:35:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:52,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:35:52,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:35:52,523 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 [2024-11-20 17:35:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:52,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:35:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829539883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:35:52,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:35:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-20 17:35:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877216743] [2024-11-20 17:35:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:35:52,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:35:52,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:35:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:35:52,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 97 [2024-11-20 17:35:52,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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) [2024-11-20 17:35:52,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:52,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 97 [2024-11-20 17:35:52,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:53,876 INFO L124 PetriNetUnfolderBase]: 7057/14013 cut-off events. [2024-11-20 17:35:53,877 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2024-11-20 17:35:53,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25617 conditions, 14013 events. 7057/14013 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 114900 event pairs, 137 based on Foata normal form. 255/13891 useless extension candidates. Maximal degree in co-relation 15217. Up to 8564 conditions per place. [2024-11-20 17:35:53,941 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 121 selfloop transitions, 4 changer transitions 0/151 dead transitions. [2024-11-20 17:35:53,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 151 transitions, 578 flow [2024-11-20 17:35:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:35:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:35:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-20 17:35:53,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5525773195876289 [2024-11-20 17:35:53,946 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 184 flow. Second operand 5 states and 268 transitions. [2024-11-20 17:35:53,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 151 transitions, 578 flow [2024-11-20 17:35:53,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 151 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:35:53,950 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 186 flow [2024-11-20 17:35:53,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-11-20 17:35:53,950 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-20 17:35:53,951 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 186 flow [2024-11-20 17:35:53,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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) [2024-11-20 17:35:53,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:53,951 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-20 17:35:53,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:35:54,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-20 17:35:54,156 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:54,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -937613290, now seen corresponding path program 1 times [2024-11-20 17:35:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:54,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054196099] [2024-11-20 17:35:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:54,173 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:35:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:54,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:35:54,185 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:35:54,186 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-20 17:35:54,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-20 17:35:54,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-20 17:35:54,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-20 17:35:54,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-20 17:35:54,187 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-20 17:35:54,187 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-20 17:35:54,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:35:54,187 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 17:35:54,187 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:35:54,188 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:35:54,209 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:35:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 126 transitions, 279 flow [2024-11-20 17:35:54,233 INFO L124 PetriNetUnfolderBase]: 42/276 cut-off events. [2024-11-20 17:35:54,234 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-20 17:35:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 276 events. 42/276 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1272 event pairs, 1 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 190. Up to 12 conditions per place. [2024-11-20 17:35:54,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 126 transitions, 279 flow [2024-11-20 17:35:54,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 126 transitions, 279 flow [2024-11-20 17:35:54,238 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:54,239 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;@5122d94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:54,239 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-20 17:35:54,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:54,240 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:35:54,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:54,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:54,241 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:54,241 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:35:54,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash 608893, now seen corresponding path program 1 times [2024-11-20 17:35:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664161995] [2024-11-20 17:35:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:54,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:54,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:54,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664161995] [2024-11-20 17:35:54,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664161995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:54,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:54,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076520339] [2024-11-20 17:35:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:54,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:54,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:54,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 126 [2024-11-20 17:35:54,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 126 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-11-20 17:35:54,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:54,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 126 [2024-11-20 17:35:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:16,075 INFO L124 PetriNetUnfolderBase]: 189484/306047 cut-off events. [2024-11-20 17:36:16,076 INFO L125 PetriNetUnfolderBase]: For 2419/2419 co-relation queries the response was YES. [2024-11-20 17:36:16,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568595 conditions, 306047 events. 189484/306047 cut-off events. For 2419/2419 co-relation queries the response was YES. Maximal size of possible extension queue 5242. Compared 2894704 event pairs, 167707 based on Foata normal form. 63279/360062 useless extension candidates. Maximal degree in co-relation 228786. Up to 231132 conditions per place. [2024-11-20 17:36:17,832 INFO L140 encePairwiseOnDemand]: 100/126 looper letters, 107 selfloop transitions, 2 changer transitions 1/143 dead transitions. [2024-11-20 17:36:17,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 143 transitions, 533 flow [2024-11-20 17:36:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2024-11-20 17:36:17,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2024-11-20 17:36:17,835 INFO L175 Difference]: Start difference. First operand has 108 places, 126 transitions, 279 flow. Second operand 3 states and 251 transitions. [2024-11-20 17:36:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 143 transitions, 533 flow [2024-11-20 17:36:17,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 143 transitions, 533 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:36:17,839 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 231 flow [2024-11-20 17:36:17,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-11-20 17:36:17,841 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -1 predicate places. [2024-11-20 17:36:17,841 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 231 flow [2024-11-20 17:36:17,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-11-20 17:36:17,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:17,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:36:17,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:36:17,842 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-20 17:36:17,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 608894, now seen corresponding path program 1 times [2024-11-20 17:36:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99906742] [2024-11-20 17:36:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99906742] [2024-11-20 17:36:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99906742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:36:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391584255] [2024-11-20 17:36:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:17,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:17,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:17,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 126 [2024-11-20 17:36:17,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-20 17:36:17,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:17,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 126 [2024-11-20 17:36:17,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand