./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:37:46,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:37:46,186 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:37:46,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:37:46,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:37:46,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:37:46,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:37:46,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:37:46,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:37:46,218 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:37:46,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:37:46,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:37:46,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:37:46,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:37:46,220 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:37:46,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:37:46,221 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:37:46,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:37:46,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:37:46,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:37:46,222 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:37:46,223 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:37:46,224 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:37:46,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:37:46,224 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:37:46,225 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:37:46,225 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:37:46,225 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:37:46,225 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:37:46,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:37:46,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:37:46,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:37:46,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:37:46,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:37:46,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:37:46,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:37:46,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:37:46,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:37:46,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:37:46,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:37:46,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:37:46,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:37:46,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2024-11-22 21:37:46,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:37:46,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:37:46,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:37:46,501 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:37:46,501 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:37:46,502 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2024-11-22 21:37:47,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:37:48,133 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:37:48,133 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2024-11-22 21:37:48,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf60a4af/c6293439d36f4e0e8527a36be83d10bf/FLAG59957ca5f [2024-11-22 21:37:48,450 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf60a4af/c6293439d36f4e0e8527a36be83d10bf [2024-11-22 21:37:48,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:37:48,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:37:48,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:37:48,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:37:48,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:37:48,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:37:48" (1/1) ... [2024-11-22 21:37:48,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1148c0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:48, skipping insertion in model container [2024-11-22 21:37:48,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:37:48" (1/1) ... [2024-11-22 21:37:48,510 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:37:48,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:37:48,998 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:37:49,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:37:49,108 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:37:49,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49 WrapperNode [2024-11-22 21:37:49,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:37:49,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:37:49,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:37:49,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:37:49,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,167 INFO L138 Inliner]: procedures = 171, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 133 [2024-11-22 21:37:49,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:37:49,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:37:49,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:37:49,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:37:49,183 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,186 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,204 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-11-22 21:37:49,204 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:37:49,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:37:49,226 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:37:49,226 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:37:49,227 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (1/1) ... [2024-11-22 21:37:49,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:37:49,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:37:49,261 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) [2024-11-22 21:37:49,263 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 [2024-11-22 21:37:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:37:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:37:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 21:37:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-22 21:37:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-22 21:37:49,307 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-22 21:37:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-22 21:37:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:37:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:37:49,310 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:37:49,429 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:37:49,431 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:37:49,731 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:37:49,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:37:50,173 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:37:50,174 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-22 21:37:50,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:37:50 BoogieIcfgContainer [2024-11-22 21:37:50,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:37:50,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:37:50,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:37:50,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:37:50,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:37:48" (1/3) ... [2024-11-22 21:37:50,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf516ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:37:50, skipping insertion in model container [2024-11-22 21:37:50,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:37:49" (2/3) ... [2024-11-22 21:37:50,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf516ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:37:50, skipping insertion in model container [2024-11-22 21:37:50,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:37:50" (3/3) ... [2024-11-22 21:37:50,185 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2024-11-22 21:37:50,203 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:37:50,204 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-22 21:37:50,204 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:37:50,250 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-22 21:37:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 60 transitions, 127 flow [2024-11-22 21:37:50,344 INFO L124 PetriNetUnfolderBase]: 15/91 cut-off events. [2024-11-22 21:37:50,344 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:37:50,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 15/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 345 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2024-11-22 21:37:50,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 60 transitions, 127 flow [2024-11-22 21:37:50,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 60 transitions, 127 flow [2024-11-22 21:37:50,372 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:37:50,380 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;@6c8aacc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:37:50,381 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-22 21:37:50,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:37:50,385 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-22 21:37:50,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:37:50,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:50,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:37:50,386 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)] === [2024-11-22 21:37:50,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash 448425, now seen corresponding path program 1 times [2024-11-22 21:37:50,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:50,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108269458] [2024-11-22 21:37:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:50,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108269458] [2024-11-22 21:37:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108269458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:37:50,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:37:50,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:37:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105252768] [2024-11-22 21:37:50,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:37:50,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:37:50,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:37:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:37:50,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-22 21:37:50,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 127 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) [2024-11-22 21:37:50,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:50,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-22 21:37:50,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:51,092 INFO L124 PetriNetUnfolderBase]: 136/437 cut-off events. [2024-11-22 21:37:51,092 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:37:51,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 437 events. 136/437 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2199 event pairs, 117 based on Foata normal form. 94/512 useless extension candidates. Maximal degree in co-relation 700. Up to 272 conditions per place. [2024-11-22 21:37:51,098 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 34 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2024-11-22 21:37:51,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 193 flow [2024-11-22 21:37:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:37:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:37:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-22 21:37:51,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-11-22 21:37:51,114 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 127 flow. Second operand 3 states and 112 transitions. [2024-11-22 21:37:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 193 flow [2024-11-22 21:37:51,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:37:51,119 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 103 flow [2024-11-22 21:37:51,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-22 21:37:51,125 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-22 21:37:51,125 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 103 flow [2024-11-22 21:37:51,126 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) [2024-11-22 21:37:51,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:51,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:37:51,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:37:51,127 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)] === [2024-11-22 21:37:51,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 448426, now seen corresponding path program 1 times [2024-11-22 21:37:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388443141] [2024-11-22 21:37:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:51,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388443141] [2024-11-22 21:37:51,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388443141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:37:51,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:37:51,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:37:51,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047069620] [2024-11-22 21:37:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:37:51,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:37:51,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:37:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:37:51,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-22 21:37:51,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 103 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) [2024-11-22 21:37:51,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:51,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-22 21:37:51,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:51,508 INFO L124 PetriNetUnfolderBase]: 117/395 cut-off events. [2024-11-22 21:37:51,509 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:37:51,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 395 events. 117/395 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2113 event pairs, 0 based on Foata normal form. 1/367 useless extension candidates. Maximal degree in co-relation 640. Up to 251 conditions per place. [2024-11-22 21:37:51,515 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-22 21:37:51,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 195 flow [2024-11-22 21:37:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:37:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:37:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-11-22 21:37:51,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-22 21:37:51,517 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 103 flow. Second operand 3 states and 104 transitions. [2024-11-22 21:37:51,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 195 flow [2024-11-22 21:37:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:37:51,521 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 109 flow [2024-11-22 21:37:51,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-22 21:37:51,522 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-22 21:37:51,522 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 109 flow [2024-11-22 21:37:51,522 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) [2024-11-22 21:37:51,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:51,524 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 21:37:51,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:37:51,525 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)] === [2024-11-22 21:37:51,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1826464974, now seen corresponding path program 1 times [2024-11-22 21:37:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:51,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688068211] [2024-11-22 21:37:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:51,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:51,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688068211] [2024-11-22 21:37:51,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688068211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:37:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75772844] [2024-11-22 21:37:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:51,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:37:51,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:37:51,760 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) [2024-11-22 21:37:51,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:37:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:51,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:37:51,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:37:51,965 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 [2024-11-22 21:37:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:52,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:37:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:52,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75772844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:37:52,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:37:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-22 21:37:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676628821] [2024-11-22 21:37:52,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:37:52,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:37:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:37:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:37:52,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-22 21:37:52,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 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) [2024-11-22 21:37:52,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:52,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-22 21:37:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:52,315 INFO L124 PetriNetUnfolderBase]: 27/88 cut-off events. [2024-11-22 21:37:52,315 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-22 21:37:52,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 88 events. 27/88 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 232 event pairs, 0 based on Foata normal form. 20/104 useless extension candidates. Maximal degree in co-relation 160. Up to 57 conditions per place. [2024-11-22 21:37:52,319 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-22 21:37:52,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2024-11-22 21:37:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:37:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:37:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-22 21:37:52,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-11-22 21:37:52,323 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 109 flow. Second operand 4 states and 111 transitions. [2024-11-22 21:37:52,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2024-11-22 21:37:52,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:37:52,325 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2024-11-22 21:37:52,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-11-22 21:37:52,326 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -23 predicate places. [2024-11-22 21:37:52,327 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2024-11-22 21:37:52,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 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) [2024-11-22 21:37:52,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:52,328 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-22 21:37:52,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:37:52,532 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 [2024-11-22 21:37:52,532 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)] === [2024-11-22 21:37:52,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash 785839751, now seen corresponding path program 1 times [2024-11-22 21:37:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465006940] [2024-11-22 21:37:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:37:52,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 21:37:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:37:52,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 21:37:52,634 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 21:37:52,636 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-22 21:37:52,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-22 21:37:52,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-22 21:37:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-22 21:37:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-22 21:37:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-22 21:37:52,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-22 21:37:52,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:37:52,640 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 21:37:52,643 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 21:37:52,643 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-22 21:37:52,666 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:37:52,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 85 transitions, 186 flow [2024-11-22 21:37:52,685 INFO L124 PetriNetUnfolderBase]: 27/159 cut-off events. [2024-11-22 21:37:52,685 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:37:52,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 159 events. 27/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 679 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2024-11-22 21:37:52,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 85 transitions, 186 flow [2024-11-22 21:37:52,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 85 transitions, 186 flow [2024-11-22 21:37:52,691 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:37:52,696 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;@6c8aacc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:37:52,696 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-22 21:37:52,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:37:52,698 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-22 21:37:52,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:37:52,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:52,698 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:37:52,699 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)] === [2024-11-22 21:37:52,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash 532830, now seen corresponding path program 1 times [2024-11-22 21:37:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822863918] [2024-11-22 21:37:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822863918] [2024-11-22 21:37:52,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822863918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:37:52,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:37:52,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:37:52,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859929466] [2024-11-22 21:37:52,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:37:52,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:37:52,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:52,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:37:52,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:37:52,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 85 [2024-11-22 21:37:52,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-22 21:37:52,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:52,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 85 [2024-11-22 21:37:52,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:53,492 INFO L124 PetriNetUnfolderBase]: 2991/6066 cut-off events. [2024-11-22 21:37:53,492 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-22 21:37:53,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10951 conditions, 6066 events. 2991/6066 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 45949 event pairs, 2583 based on Foata normal form. 1632/7435 useless extension candidates. Maximal degree in co-relation 8032. Up to 4189 conditions per place. [2024-11-22 21:37:53,532 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 54 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2024-11-22 21:37:53,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 298 flow [2024-11-22 21:37:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:37:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:37:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-22 21:37:53,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-11-22 21:37:53,534 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 186 flow. Second operand 3 states and 168 transitions. [2024-11-22 21:37:53,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 298 flow [2024-11-22 21:37:53,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:37:53,537 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 150 flow [2024-11-22 21:37:53,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-22 21:37:53,538 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-22 21:37:53,538 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 150 flow [2024-11-22 21:37:53,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-22 21:37:53,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:53,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:37:53,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:37:53,539 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)] === [2024-11-22 21:37:53,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 532831, now seen corresponding path program 1 times [2024-11-22 21:37:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375825548] [2024-11-22 21:37:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375825548] [2024-11-22 21:37:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375825548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:37:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:37:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:37:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532651687] [2024-11-22 21:37:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:37:53,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:37:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:37:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:37:53,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 85 [2024-11-22 21:37:53,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-22 21:37:53,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:53,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 85 [2024-11-22 21:37:53,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:54,283 INFO L124 PetriNetUnfolderBase]: 2594/5471 cut-off events. [2024-11-22 21:37:54,283 INFO L125 PetriNetUnfolderBase]: For 135/143 co-relation queries the response was YES. [2024-11-22 21:37:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 5471 events. 2594/5471 cut-off events. For 135/143 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41717 event pairs, 2574 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 9025. Up to 4168 conditions per place. [2024-11-22 21:37:54,319 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 46 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-22 21:37:54,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 268 flow [2024-11-22 21:37:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:37:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:37:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-22 21:37:54,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-22 21:37:54,322 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 150 flow. Second operand 3 states and 140 transitions. [2024-11-22 21:37:54,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 268 flow [2024-11-22 21:37:54,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:37:54,331 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 160 flow [2024-11-22 21:37:54,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-22 21:37:54,333 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-22 21:37:54,333 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 160 flow [2024-11-22 21:37:54,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-22 21:37:54,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:54,334 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 21:37:54,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:37:54,334 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)] === [2024-11-22 21:37:54,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1824821812, now seen corresponding path program 1 times [2024-11-22 21:37:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:54,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640004560] [2024-11-22 21:37:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:54,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640004560] [2024-11-22 21:37:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640004560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:37:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803938261] [2024-11-22 21:37:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:54,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:37:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:37:54,441 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) [2024-11-22 21:37:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:37:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:54,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:37:54,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:37:54,587 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 [2024-11-22 21:37:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:54,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:37:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803938261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:37:54,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:37:54,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-22 21:37:54,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739330084] [2024-11-22 21:37:54,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:37:54,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:37:54,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:54,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:37:54,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:37:54,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2024-11-22 21:37:54,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2024-11-22 21:37:54,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:54,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2024-11-22 21:37:54,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:37:55,316 INFO L124 PetriNetUnfolderBase]: 2512/5297 cut-off events. [2024-11-22 21:37:55,316 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2024-11-22 21:37:55,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9596 conditions, 5297 events. 2512/5297 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 41878 event pairs, 97 based on Foata normal form. 120/5220 useless extension candidates. Maximal degree in co-relation 8553. Up to 2919 conditions per place. [2024-11-22 21:37:55,349 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 83 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-22 21:37:55,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 114 transitions, 428 flow [2024-11-22 21:37:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:37:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:37:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-22 21:37:55,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2024-11-22 21:37:55,352 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 160 flow. Second operand 5 states and 235 transitions. [2024-11-22 21:37:55,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 114 transitions, 428 flow [2024-11-22 21:37:55,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:37:55,356 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 162 flow [2024-11-22 21:37:55,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-11-22 21:37:55,357 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-22 21:37:55,357 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 162 flow [2024-11-22 21:37:55,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2024-11-22 21:37:55,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:55,358 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-22 21:37:55,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:37:55,561 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 [2024-11-22 21:37:55,562 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)] === [2024-11-22 21:37:55,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1287858967, now seen corresponding path program 1 times [2024-11-22 21:37:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788516811] [2024-11-22 21:37:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:37:55,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 21:37:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:37:55,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 21:37:55,617 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 21:37:55,617 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-22 21:37:55,617 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-22 21:37:55,617 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-22 21:37:55,617 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-22 21:37:55,618 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-22 21:37:55,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-22 21:37:55,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-22 21:37:55,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:37:55,620 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 21:37:55,620 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 21:37:55,620 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-22 21:37:55,653 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:37:55,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 110 transitions, 247 flow [2024-11-22 21:37:55,676 INFO L124 PetriNetUnfolderBase]: 42/248 cut-off events. [2024-11-22 21:37:55,676 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 21:37:55,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 248 events. 42/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1116 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2024-11-22 21:37:55,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 110 transitions, 247 flow [2024-11-22 21:37:55,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 110 transitions, 247 flow [2024-11-22 21:37:55,681 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:37:55,682 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;@6c8aacc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:37:55,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-22 21:37:55,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:37:55,684 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-22 21:37:55,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:37:55,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:37:55,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:37:55,685 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)] === [2024-11-22 21:37:55,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:37:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 642060, now seen corresponding path program 1 times [2024-11-22 21:37:55,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:37:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049837429] [2024-11-22 21:37:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:37:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:37:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:37:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:37:55,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:37:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049837429] [2024-11-22 21:37:55,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049837429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:37:55,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:37:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:37:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851366030] [2024-11-22 21:37:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:37:55,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:37:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:37:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:37:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:37:55,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 110 [2024-11-22 21:37:55,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-22 21:37:55,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:37:55,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 110 [2024-11-22 21:37:55,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:38:02,011 INFO L124 PetriNetUnfolderBase]: 47447/78707 cut-off events. [2024-11-22 21:38:02,012 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-11-22 21:38:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145940 conditions, 78707 events. 47447/78707 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2012. Compared 706973 event pairs, 40780 based on Foata normal form. 23856/99464 useless extension candidates. Maximal degree in co-relation 53254. Up to 57237 conditions per place. [2024-11-22 21:38:02,638 INFO L140 encePairwiseOnDemand]: 84/110 looper letters, 74 selfloop transitions, 2 changer transitions 1/112 dead transitions. [2024-11-22 21:38:02,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 405 flow [2024-11-22 21:38:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:38:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:38:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-22 21:38:02,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2024-11-22 21:38:02,640 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 247 flow. Second operand 3 states and 224 transitions. [2024-11-22 21:38:02,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 405 flow [2024-11-22 21:38:02,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 112 transitions, 405 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:38:02,646 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 199 flow [2024-11-22 21:38:02,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-11-22 21:38:02,647 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-11-22 21:38:02,647 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 199 flow [2024-11-22 21:38:02,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-22 21:38:02,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:38:02,648 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:38:02,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:38:02,648 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)] === [2024-11-22 21:38:02,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:38:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 642061, now seen corresponding path program 1 times [2024-11-22 21:38:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:38:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246244683] [2024-11-22 21:38:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:38:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:38:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:38:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:38:02,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:38:02,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246244683] [2024-11-22 21:38:02,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246244683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:38:02,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:38:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:38:02,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459791556] [2024-11-22 21:38:02,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:38:02,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:38:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:38:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:38:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:38:02,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 110 [2024-11-22 21:38:02,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-11-22 21:38:02,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:38:02,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 110 [2024-11-22 21:38:02,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:38:07,456 INFO L124 PetriNetUnfolderBase]: 40912/69187 cut-off events. [2024-11-22 21:38:07,457 INFO L125 PetriNetUnfolderBase]: For 2262/2336 co-relation queries the response was YES. [2024-11-22 21:38:07,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128547 conditions, 69187 events. 40912/69187 cut-off events. For 2262/2336 co-relation queries the response was YES. Maximal size of possible extension queue 1824. Compared 621202 event pairs, 40771 based on Foata normal form. 1/66026 useless extension candidates. Maximal degree in co-relation 116944. Up to 57216 conditions per place. [2024-11-22 21:38:07,900 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 57 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2024-11-22 21:38:07,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 339 flow [2024-11-22 21:38:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:38:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:38:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-22 21:38:07,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-22 21:38:07,902 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 199 flow. Second operand 3 states and 175 transitions. [2024-11-22 21:38:07,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 339 flow [2024-11-22 21:38:08,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:38:08,022 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 209 flow [2024-11-22 21:38:08,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2024-11-22 21:38:08,023 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-11-22 21:38:08,023 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 209 flow [2024-11-22 21:38:08,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-11-22 21:38:08,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:38:08,023 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 21:38:08,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:38:08,024 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)] === [2024-11-22 21:38:08,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:38:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash 271200643, now seen corresponding path program 1 times [2024-11-22 21:38:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:38:08,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301912256] [2024-11-22 21:38:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:38:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:38:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:38:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:38:08,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:38:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301912256] [2024-11-22 21:38:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301912256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:38:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565542837] [2024-11-22 21:38:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:38:08,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:38:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:38:08,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:38:08,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:38:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:38:08,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:38:08,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:38:08,315 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 [2024-11-22 21:38:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:38:08,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:38:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:38:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565542837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:38:08,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:38:08,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-22 21:38:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874509586] [2024-11-22 21:38:08,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:38:08,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:38:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:38:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:38:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:38:08,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2024-11-22 21:38:08,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 209 flow. Second operand has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 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) [2024-11-22 21:38:08,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:38:08,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2024-11-22 21:38:08,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:38:10,202 INFO L124 PetriNetUnfolderBase]: 10557/17688 cut-off events. [2024-11-22 21:38:10,202 INFO L125 PetriNetUnfolderBase]: For 3709/3709 co-relation queries the response was YES. [2024-11-22 21:38:10,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34248 conditions, 17688 events. 10557/17688 cut-off events. For 3709/3709 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 134203 event pairs, 1600 based on Foata normal form. 2220/19764 useless extension candidates. Maximal degree in co-relation 3508. Up to 11100 conditions per place. [2024-11-22 21:38:10,314 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-22 21:38:10,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 462 flow [2024-11-22 21:38:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:38:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:38:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-22 21:38:10,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-22 21:38:10,316 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 209 flow. Second operand 6 states and 324 transitions. [2024-11-22 21:38:10,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 462 flow [2024-11-22 21:38:10,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:38:10,320 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 154 flow [2024-11-22 21:38:10,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-22 21:38:10,321 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -19 predicate places. [2024-11-22 21:38:10,321 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 154 flow [2024-11-22 21:38:10,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 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) [2024-11-22 21:38:10,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:38:10,322 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-22 21:38:10,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:38:10,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:38:10,524 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)] === [2024-11-22 21:38:10,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:38:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1468699386, now seen corresponding path program 1 times [2024-11-22 21:38:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:38:10,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590365378] [2024-11-22 21:38:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:38:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:38:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:38:10,560 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 21:38:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 21:38:10,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 21:38:10,587 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 21:38:10,587 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-22 21:38:10,589 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-22 21:38:10,589 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-22 21:38:10,589 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-22 21:38:10,589 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-22 21:38:10,589 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-22 21:38:10,590 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-22 21:38:10,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:38:10,590 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 21:38:10,591 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 21:38:10,592 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-22 21:38:10,621 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-22 21:38:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 135 transitions, 310 flow [2024-11-22 21:38:10,657 INFO L124 PetriNetUnfolderBase]: 65/381 cut-off events. [2024-11-22 21:38:10,658 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-22 21:38:10,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 381 events. 65/381 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1857 event pairs, 6 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 272. Up to 32 conditions per place. [2024-11-22 21:38:10,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 135 transitions, 310 flow [2024-11-22 21:38:10,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 135 transitions, 310 flow [2024-11-22 21:38:10,668 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:38:10,671 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;@6c8aacc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:38:10,672 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-22 21:38:10,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:38:10,674 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-22 21:38:10,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:38:10,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:38:10,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:38:10,675 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)] === [2024-11-22 21:38:10,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:38:10,675 INFO L85 PathProgramCache]: Analyzing trace with hash 776115, now seen corresponding path program 1 times [2024-11-22 21:38:10,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:38:10,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676461164] [2024-11-22 21:38:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:38:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:38:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:38:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:38:10,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:38:10,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676461164] [2024-11-22 21:38:10,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676461164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:38:10,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:38:10,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:38:10,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501985242] [2024-11-22 21:38:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:38:10,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:38:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:38:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:38:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:38:10,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 135 [2024-11-22 21:38:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 310 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) [2024-11-22 21:38:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:38:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 135 [2024-11-22 21:38:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand