./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_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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_27-funptr_racing.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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:44:16,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:44:16,189 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:44:16,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:44:16,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:44:16,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:44:16,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:44:16,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:44:16,223 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:44:16,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:44:16,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:44:16,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:44:16,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:44:16,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:44:16,227 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:44:16,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:44:16,228 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:44:16,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:44:16,228 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:44:16,228 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:44:16,228 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:44:16,231 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:44:16,231 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:44:16,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:44:16,231 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:44:16,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:44:16,232 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:44:16,232 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:44:16,232 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:44:16,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:44:16,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:44:16,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:44:16,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:44:16,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:44:16,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:44:16,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:44:16,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:44:16,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:44:16,234 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:44:16,234 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:44:16,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:44:16,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:44:16,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2024-10-14 19:44:16,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:44:16,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:44:16,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:44:16,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:44:16,479 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:44:16,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2024-10-14 19:44:17,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:44:18,210 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:44:18,211 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2024-10-14 19:44:18,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58119dcad/b13f40e5d4ea4a3384b315fb26ff248d/FLAGe0c490927 [2024-10-14 19:44:18,522 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58119dcad/b13f40e5d4ea4a3384b315fb26ff248d [2024-10-14 19:44:18,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:44:18,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:44:18,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:44:18,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:44:18,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:44:18,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:44:18" (1/1) ... [2024-10-14 19:44:18,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3516b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:18, skipping insertion in model container [2024-10-14 19:44:18,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:44:18" (1/1) ... [2024-10-14 19:44:18,591 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:44:18,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:44:18,958 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:44:18,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:44:19,044 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:44:19,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19 WrapperNode [2024-10-14 19:44:19,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:44:19,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:44:19,047 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:44:19,047 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:44:19,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,104 INFO L138 Inliner]: procedures = 274, calls = 53, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 175 [2024-10-14 19:44:19,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:44:19,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:44:19,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:44:19,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:44:19,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,126 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,145 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-10-14 19:44:19,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,172 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:44:19,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:44:19,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:44:19,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:44:19,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (1/1) ... [2024-10-14 19:44:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:44:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:44:19,222 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) [2024-10-14 19:44:19,225 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 [2024-10-14 19:44:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 19:44:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 19:44:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:44:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-14 19:44:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 19:44:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:44:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:44:19,269 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:44:19,472 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:44:19,474 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:44:19,669 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:44:19,669 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:44:19,773 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:44:19,773 INFO L314 CfgBuilder]: Removed 16 assume(true) statements. [2024-10-14 19:44:19,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:44:19 BoogieIcfgContainer [2024-10-14 19:44:19,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:44:19,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:44:19,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:44:19,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:44:19,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:44:18" (1/3) ... [2024-10-14 19:44:19,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25b42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:44:19, skipping insertion in model container [2024-10-14 19:44:19,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:44:19" (2/3) ... [2024-10-14 19:44:19,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25b42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:44:19, skipping insertion in model container [2024-10-14 19:44:19,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:44:19" (3/3) ... [2024-10-14 19:44:19,780 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2024-10-14 19:44:19,795 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:44:19,795 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-14 19:44:19,795 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:44:19,827 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-14 19:44:19,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 90 transitions, 187 flow [2024-10-14 19:44:19,886 INFO L124 PetriNetUnfolderBase]: 22/125 cut-off events. [2024-10-14 19:44:19,886 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 19:44:19,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 22/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 482 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2024-10-14 19:44:19,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 90 transitions, 187 flow [2024-10-14 19:44:19,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 90 transitions, 187 flow [2024-10-14 19:44:19,900 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:44:19,905 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;@6878b0d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:44:19,906 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 19:44:19,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:44:19,909 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:44:19,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:44:19,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:19,909 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:44:19,910 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)] === [2024-10-14 19:44:19,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 474892, now seen corresponding path program 1 times [2024-10-14 19:44:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973294465] [2024-10-14 19:44:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973294465] [2024-10-14 19:44:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973294465] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:44:20,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:44:20,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:44:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366594426] [2024-10-14 19:44:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:44:20,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:44:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:44:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:44:20,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 90 [2024-10-14 19:44:20,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 187 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) [2024-10-14 19:44:20,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:20,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 90 [2024-10-14 19:44:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:20,501 INFO L124 PetriNetUnfolderBase]: 417/1219 cut-off events. [2024-10-14 19:44:20,501 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 19:44:20,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 1219 events. 417/1219 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7506 event pairs, 353 based on Foata normal form. 220/1383 useless extension candidates. Maximal degree in co-relation 2039. Up to 778 conditions per place. [2024-10-14 19:44:20,512 INFO L140 encePairwiseOnDemand]: 70/90 looper letters, 65 selfloop transitions, 2 changer transitions 1/94 dead transitions. [2024-10-14 19:44:20,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 331 flow [2024-10-14 19:44:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:44:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:44:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-10-14 19:44:20,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-10-14 19:44:20,525 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 187 flow. Second operand 3 states and 176 transitions. [2024-10-14 19:44:20,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 331 flow [2024-10-14 19:44:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 331 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:44:20,534 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 151 flow [2024-10-14 19:44:20,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-10-14 19:44:20,541 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2024-10-14 19:44:20,541 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 151 flow [2024-10-14 19:44:20,541 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) [2024-10-14 19:44:20,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:20,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:44:20,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 19:44:20,542 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)] === [2024-10-14 19:44:20,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 474893, now seen corresponding path program 1 times [2024-10-14 19:44:20,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:20,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856669787] [2024-10-14 19:44:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:20,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:20,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:20,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856669787] [2024-10-14 19:44:20,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856669787] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:44:20,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:44:20,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:44:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833146749] [2024-10-14 19:44:20,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:44:20,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:44:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:44:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:44:20,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 90 [2024-10-14 19:44:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 151 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) [2024-10-14 19:44:20,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:20,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 90 [2024-10-14 19:44:20,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:20,877 INFO L124 PetriNetUnfolderBase]: 384/1114 cut-off events. [2024-10-14 19:44:20,878 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 19:44:20,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1114 events. 384/1114 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7147 event pairs, 15 based on Foata normal form. 1/1034 useless extension candidates. Maximal degree in co-relation 1894. Up to 771 conditions per place. [2024-10-14 19:44:20,885 INFO L140 encePairwiseOnDemand]: 86/90 looper letters, 65 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-10-14 19:44:20,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 333 flow [2024-10-14 19:44:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:44:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:44:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-10-14 19:44:20,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-10-14 19:44:20,889 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 151 flow. Second operand 3 states and 156 transitions. [2024-10-14 19:44:20,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 333 flow [2024-10-14 19:44:20,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:44:20,894 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 157 flow [2024-10-14 19:44:20,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-10-14 19:44:20,895 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2024-10-14 19:44:20,896 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 157 flow [2024-10-14 19:44:20,896 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) [2024-10-14 19:44:20,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:20,897 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-14 19:44:20,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 19:44:20,897 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)] === [2024-10-14 19:44:20,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash 501731155, now seen corresponding path program 1 times [2024-10-14 19:44:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:20,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683561161] [2024-10-14 19:44:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:21,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:21,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683561161] [2024-10-14 19:44:21,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683561161] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:44:21,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754266964] [2024-10-14 19:44:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:21,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:44:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:44:21,057 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) [2024-10-14 19:44:21,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 19:44:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:21,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:44:21,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:44:21,190 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 [2024-10-14 19:44:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:21,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:44:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:21,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754266964] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:44:21,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:44:21,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-14 19:44:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692173673] [2024-10-14 19:44:21,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:44:21,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 19:44:21,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 19:44:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-14 19:44:21,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 90 [2024-10-14 19:44:21,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 157 flow. Second operand has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 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) [2024-10-14 19:44:21,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:21,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 90 [2024-10-14 19:44:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:21,552 INFO L124 PetriNetUnfolderBase]: 70/222 cut-off events. [2024-10-14 19:44:21,553 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-14 19:44:21,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 222 events. 70/222 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 800 event pairs, 28 based on Foata normal form. 46/263 useless extension candidates. Maximal degree in co-relation 415. Up to 138 conditions per place. [2024-10-14 19:44:21,554 INFO L140 encePairwiseOnDemand]: 86/90 looper letters, 51 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-10-14 19:44:21,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 252 flow [2024-10-14 19:44:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:44:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:44:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2024-10-14 19:44:21,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-10-14 19:44:21,555 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 157 flow. Second operand 4 states and 167 transitions. [2024-10-14 19:44:21,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 252 flow [2024-10-14 19:44:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:44:21,556 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 94 flow [2024-10-14 19:44:21,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-10-14 19:44:21,557 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -27 predicate places. [2024-10-14 19:44:21,557 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 94 flow [2024-10-14 19:44:21,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 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) [2024-10-14 19:44:21,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:21,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-14 19:44:21,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 19:44:21,758 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 [2024-10-14 19:44:21,759 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)] === [2024-10-14 19:44:21,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1626202901, now seen corresponding path program 1 times [2024-10-14 19:44:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:21,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596484275] [2024-10-14 19:44:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:21,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:44:21,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:44:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:44:21,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:44:21,801 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:44:21,802 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-14 19:44:21,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-14 19:44:21,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 19:44:21,809 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-14 19:44:21,814 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:44:21,814 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 19:44:21,842 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:44:21,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 298 flow [2024-10-14 19:44:21,856 INFO L124 PetriNetUnfolderBase]: 41/223 cut-off events. [2024-10-14 19:44:21,856 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 19:44:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 223 events. 41/223 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1027 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 144. Up to 6 conditions per place. [2024-10-14 19:44:21,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 298 flow [2024-10-14 19:44:21,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 298 flow [2024-10-14 19:44:21,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:44:21,861 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;@6878b0d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:44:21,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 19:44:21,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:44:21,862 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:44:21,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:44:21,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:21,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:44:21,862 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)] === [2024-10-14 19:44:21,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash 614905, now seen corresponding path program 1 times [2024-10-14 19:44:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:21,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250358401] [2024-10-14 19:44:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250358401] [2024-10-14 19:44:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250358401] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:44:21,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:44:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:44:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243686266] [2024-10-14 19:44:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:44:21,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:44:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:44:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:44:21,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 141 [2024-10-14 19:44:21,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:44:21,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:21,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 141 [2024-10-14 19:44:21,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:24,871 INFO L124 PetriNetUnfolderBase]: 20611/40354 cut-off events. [2024-10-14 19:44:24,873 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-10-14 19:44:24,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71989 conditions, 40354 events. 20611/40354 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 377814 event pairs, 17426 based on Foata normal form. 8616/46783 useless extension candidates. Maximal degree in co-relation 60927. Up to 27900 conditions per place. [2024-10-14 19:44:25,068 INFO L140 encePairwiseOnDemand]: 109/141 looper letters, 113 selfloop transitions, 2 changer transitions 1/156 dead transitions. [2024-10-14 19:44:25,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 156 transitions, 560 flow [2024-10-14 19:44:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:44:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:44:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2024-10-14 19:44:25,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6855791962174941 [2024-10-14 19:44:25,070 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 298 flow. Second operand 3 states and 290 transitions. [2024-10-14 19:44:25,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 156 transitions, 560 flow [2024-10-14 19:44:25,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 156 transitions, 560 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:44:25,073 INFO L231 Difference]: Finished difference. Result has 113 places, 109 transitions, 238 flow [2024-10-14 19:44:25,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=113, PETRI_TRANSITIONS=109} [2024-10-14 19:44:25,074 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2024-10-14 19:44:25,074 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 109 transitions, 238 flow [2024-10-14 19:44:25,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:44:25,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:25,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:44:25,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 19:44:25,075 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)] === [2024-10-14 19:44:25,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash 614906, now seen corresponding path program 1 times [2024-10-14 19:44:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:25,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085794270] [2024-10-14 19:44:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085794270] [2024-10-14 19:44:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085794270] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:44:25,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:44:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:44:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565862900] [2024-10-14 19:44:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:44:25,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:44:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:44:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:44:25,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 141 [2024-10-14 19:44:25,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 109 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2024-10-14 19:44:25,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:25,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 141 [2024-10-14 19:44:25,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:27,361 INFO L124 PetriNetUnfolderBase]: 18236/37364 cut-off events. [2024-10-14 19:44:27,361 INFO L125 PetriNetUnfolderBase]: For 391/391 co-relation queries the response was YES. [2024-10-14 19:44:27,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65967 conditions, 37364 events. 18236/37364 cut-off events. For 391/391 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 361308 event pairs, 14096 based on Foata normal form. 1/35026 useless extension candidates. Maximal degree in co-relation 61223. Up to 27850 conditions per place. [2024-10-14 19:44:27,512 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 91 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-10-14 19:44:27,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 134 transitions, 474 flow [2024-10-14 19:44:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:44:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:44:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-10-14 19:44:27,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-10-14 19:44:27,514 INFO L175 Difference]: Start difference. First operand has 113 places, 109 transitions, 238 flow. Second operand 3 states and 224 transitions. [2024-10-14 19:44:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 134 transitions, 474 flow [2024-10-14 19:44:27,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 134 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:44:27,558 INFO L231 Difference]: Finished difference. Result has 113 places, 110 transitions, 248 flow [2024-10-14 19:44:27,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=113, PETRI_TRANSITIONS=110} [2024-10-14 19:44:27,560 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2024-10-14 19:44:27,560 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 110 transitions, 248 flow [2024-10-14 19:44:27,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2024-10-14 19:44:27,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:27,562 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-14 19:44:27,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 19:44:27,562 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)] === [2024-10-14 19:44:27,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash 963458351, now seen corresponding path program 1 times [2024-10-14 19:44:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:27,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990949701] [2024-10-14 19:44:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:27,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990949701] [2024-10-14 19:44:27,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990949701] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:44:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211296788] [2024-10-14 19:44:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:44:27,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:44:27,670 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) [2024-10-14 19:44:27,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 19:44:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:27,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:44:27,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:44:27,747 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 [2024-10-14 19:44:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:27,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:44:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211296788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:44:27,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:44:27,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-14 19:44:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130112548] [2024-10-14 19:44:27,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:44:27,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 19:44:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 19:44:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-14 19:44:27,884 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 141 [2024-10-14 19:44:27,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 110 transitions, 248 flow. Second operand has 9 states, 9 states have (on average 44.333333333333336) internal successors, (399), 9 states have internal predecessors, (399), 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) [2024-10-14 19:44:27,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:27,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 141 [2024-10-14 19:44:27,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:44:28,445 INFO L124 PetriNetUnfolderBase]: 4048/7420 cut-off events. [2024-10-14 19:44:28,445 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2024-10-14 19:44:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14491 conditions, 7420 events. 4048/7420 cut-off events. For 1240/1240 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 53318 event pairs, 432 based on Foata normal form. 1198/8146 useless extension candidates. Maximal degree in co-relation 5290. Up to 5146 conditions per place. [2024-10-14 19:44:28,475 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 123 selfloop transitions, 3 changer transitions 0/155 dead transitions. [2024-10-14 19:44:28,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 155 transitions, 580 flow [2024-10-14 19:44:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:44:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:44:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2024-10-14 19:44:28,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-10-14 19:44:28,476 INFO L175 Difference]: Start difference. First operand has 113 places, 110 transitions, 248 flow. Second operand 5 states and 340 transitions. [2024-10-14 19:44:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 155 transitions, 580 flow [2024-10-14 19:44:28,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 155 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:44:28,479 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 186 flow [2024-10-14 19:44:28,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2024-10-14 19:44:28,480 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -24 predicate places. [2024-10-14 19:44:28,480 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 186 flow [2024-10-14 19:44:28,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.333333333333336) internal successors, (399), 9 states have internal predecessors, (399), 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) [2024-10-14 19:44:28,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:28,481 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-14 19:44:28,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:44:28,684 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 [2024-10-14 19:44:28,685 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)] === [2024-10-14 19:44:28,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1983876935, now seen corresponding path program 1 times [2024-10-14 19:44:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:28,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485645596] [2024-10-14 19:44:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:44:28,700 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:44:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:44:28,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:44:28,715 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:44:28,715 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-14 19:44:28,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-10-14 19:44:28,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-10-14 19:44:28,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-10-14 19:44:28,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-10-14 19:44:28,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-14 19:44:28,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-14 19:44:28,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 19:44:28,716 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-14 19:44:28,717 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:44:28,717 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 19:44:28,751 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:44:28,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 192 transitions, 411 flow [2024-10-14 19:44:28,773 INFO L124 PetriNetUnfolderBase]: 63/342 cut-off events. [2024-10-14 19:44:28,773 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-14 19:44:28,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 342 events. 63/342 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1708 event pairs, 1 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 234. Up to 12 conditions per place. [2024-10-14 19:44:28,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 192 transitions, 411 flow [2024-10-14 19:44:28,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 192 transitions, 411 flow [2024-10-14 19:44:28,779 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:44:28,780 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;@6878b0d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:44:28,780 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 19:44:28,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:44:28,781 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:44:28,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:44:28,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:44:28,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:44:28,781 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)] === [2024-10-14 19:44:28,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:44:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 805561, now seen corresponding path program 1 times [2024-10-14 19:44:28,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:44:28,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240345672] [2024-10-14 19:44:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:44:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:44:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:44:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:44:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:44:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240345672] [2024-10-14 19:44:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240345672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:44:28,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:44:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:44:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654991117] [2024-10-14 19:44:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:44:28,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:44:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:44:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:44:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:44:28,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 192 [2024-10-14 19:44:28,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 192 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2024-10-14 19:44:28,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:44:28,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 192 [2024-10-14 19:44:28,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand