./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:07:49,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:07:49,295 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:07:49,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:07:49,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:07:49,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:07:49,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:07:49,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:07:49,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:07:49,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:07:49,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:07:49,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:07:49,332 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:07:49,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:07:49,333 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:07:49,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:07:49,333 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:07:49,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:07:49,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:07:49,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:07:49,335 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:07:49,335 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:07:49,339 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:07:49,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:07:49,339 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:07:49,340 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:07:49,340 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:07:49,340 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:07:49,340 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:07:49,341 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:07:49,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:07:49,341 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:07:49,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:07:49,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:07:49,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:07:49,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:07:49,342 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:07:49,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:07:49,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:07:49,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:07:49,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:07:49,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:07:49,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2024-11-10 18:07:49,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:07:49,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:07:49,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:07:49,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:07:49,629 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:07:49,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-10 18:07:51,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:07:51,340 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:07:51,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-10 18:07:51,358 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a456b778/bbd737a85ef443099458ebe7f0203bcf/FLAG2d9bdc6fc [2024-11-10 18:07:51,371 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a456b778/bbd737a85ef443099458ebe7f0203bcf [2024-11-10 18:07:51,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:07:51,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:07:51,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:07:51,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:07:51,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:07:51,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:07:51" (1/1) ... [2024-11-10 18:07:51,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b83fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:51, skipping insertion in model container [2024-11-10 18:07:51,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:07:51" (1/1) ... [2024-11-10 18:07:51,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:07:51,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:07:51,937 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:07:51,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:07:52,048 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:07:52,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52 WrapperNode [2024-11-10 18:07:52,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:07:52,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:07:52,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:07:52,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:07:52,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,106 INFO L138 Inliner]: procedures = 173, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 115 [2024-11-10 18:07:52,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:07:52,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:07:52,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:07:52,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:07:52,121 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,161 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]. [2024-11-10 18:07:52,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,180 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:07:52,198 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:07:52,198 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:07:52,198 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:07:52,199 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (1/1) ... [2024-11-10 18:07:52,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:07:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:52,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:07:52,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:07:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:07:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:07:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:07:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:07:52,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:07:52,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:07:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:07:52,300 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:07:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:07:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:07:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:07:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:07:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:07:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:07:52,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:07:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:07:52,304 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:07:52,462 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:07:52,464 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:07:52,648 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L712: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:07:52,648 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L712-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:07:52,694 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:07:52,695 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:07:52,850 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:07:52,850 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:07:52,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:07:52 BoogieIcfgContainer [2024-11-10 18:07:52,851 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:07:52,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:07:52,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:07:52,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:07:52,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:07:51" (1/3) ... [2024-11-10 18:07:52,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f62e2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:07:52, skipping insertion in model container [2024-11-10 18:07:52,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:52" (2/3) ... [2024-11-10 18:07:52,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f62e2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:07:52, skipping insertion in model container [2024-11-10 18:07:52,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:07:52" (3/3) ... [2024-11-10 18:07:52,864 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2024-11-10 18:07:52,880 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:07:52,881 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-10 18:07:52,881 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:07:52,930 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:07:52,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 71 transitions, 149 flow [2024-11-10 18:07:53,004 INFO L124 PetriNetUnfolderBase]: 19/110 cut-off events. [2024-11-10 18:07:53,004 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:07:53,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 19/110 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 384 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2024-11-10 18:07:53,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 71 transitions, 149 flow [2024-11-10 18:07:53,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 71 transitions, 149 flow [2024-11-10 18:07:53,028 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:53,037 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;@7e24a18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:53,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:53,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:53,046 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:53,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:53,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:53,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:53,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:53,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash 9814701, now seen corresponding path program 1 times [2024-11-10 18:07:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681275262] [2024-11-10 18:07:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:53,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681275262] [2024-11-10 18:07:53,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681275262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:53,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:53,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099476845] [2024-11-10 18:07:53,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:53,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:53,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 71 [2024-11-10 18:07:53,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:53,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:53,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 71 [2024-11-10 18:07:53,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:53,721 INFO L124 PetriNetUnfolderBase]: 177/612 cut-off events. [2024-11-10 18:07:53,722 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:07:53,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 612 events. 177/612 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3317 event pairs, 154 based on Foata normal form. 177/771 useless extension candidates. Maximal degree in co-relation 955. Up to 350 conditions per place. [2024-11-10 18:07:53,729 INFO L140 encePairwiseOnDemand]: 55/71 looper letters, 39 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2024-11-10 18:07:53,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 225 flow [2024-11-10 18:07:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-10 18:07:53,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6431924882629108 [2024-11-10 18:07:53,747 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 149 flow. Second operand 3 states and 137 transitions. [2024-11-10 18:07:53,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 225 flow [2024-11-10 18:07:53,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:07:53,758 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 121 flow [2024-11-10 18:07:53,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-10 18:07:53,765 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-11-10 18:07:53,766 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 121 flow [2024-11-10 18:07:53,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:53,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:53,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:53,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:07:53,770 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:53,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 9814702, now seen corresponding path program 1 times [2024-11-10 18:07:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813217964] [2024-11-10 18:07:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:53,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:53,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813217964] [2024-11-10 18:07:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813217964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:53,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:53,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090008651] [2024-11-10 18:07:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:53,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:53,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 71 [2024-11-10 18:07:53,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 121 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) [2024-11-10 18:07:53,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:53,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 71 [2024-11-10 18:07:53,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:54,145 INFO L124 PetriNetUnfolderBase]: 165/571 cut-off events. [2024-11-10 18:07:54,146 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-10 18:07:54,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 571 events. 165/571 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3121 event pairs, 0 based on Foata normal form. 1/528 useless extension candidates. Maximal degree in co-relation 913. Up to 349 conditions per place. [2024-11-10 18:07:54,154 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 40 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-10 18:07:54,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 229 flow [2024-11-10 18:07:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-10 18:07:54,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5868544600938967 [2024-11-10 18:07:54,161 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 121 flow. Second operand 3 states and 125 transitions. [2024-11-10 18:07:54,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 229 flow [2024-11-10 18:07:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:07:54,167 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 127 flow [2024-11-10 18:07:54,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-10 18:07:54,170 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-11-10 18:07:54,170 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 127 flow [2024-11-10 18:07:54,170 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) [2024-11-10 18:07:54,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:54,171 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:07:54,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:07:54,171 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:54,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1490491214, now seen corresponding path program 1 times [2024-11-10 18:07:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541836890] [2024-11-10 18:07:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541836890] [2024-11-10 18:07:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541836890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220748370] [2024-11-10 18:07:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:54,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:54,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:07:54,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:07:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:54,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:07:54,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:54,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:07:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:54,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:54,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220748370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:54,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:54,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:07:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405695156] [2024-11-10 18:07:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:54,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:07:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:07:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:07:54,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 71 [2024-11-10 18:07:54,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 28.333333333333332) internal successors, (255), 9 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:54,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:54,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 71 [2024-11-10 18:07:54,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:54,911 INFO L124 PetriNetUnfolderBase]: 33/118 cut-off events. [2024-11-10 18:07:54,911 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-10 18:07:54,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 118 events. 33/118 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 340 event pairs, 0 based on Foata normal form. 24/139 useless extension candidates. Maximal degree in co-relation 205. Up to 69 conditions per place. [2024-11-10 18:07:54,913 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 27 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-10 18:07:54,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 148 flow [2024-11-10 18:07:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:07:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:07:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-10 18:07:54,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4753521126760563 [2024-11-10 18:07:54,915 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 127 flow. Second operand 4 states and 135 transitions. [2024-11-10 18:07:54,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 148 flow [2024-11-10 18:07:54,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:07:54,917 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 62 flow [2024-11-10 18:07:54,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-11-10 18:07:54,918 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -28 predicate places. [2024-11-10 18:07:54,918 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 62 flow [2024-11-10 18:07:54,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.333333333333332) internal successors, (255), 9 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:54,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:54,919 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-10 18:07:54,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:07:55,119 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 [2024-11-10 18:07:55,120 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:55,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1039412355, now seen corresponding path program 1 times [2024-11-10 18:07:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:55,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319452903] [2024-11-10 18:07:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:55,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:07:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:55,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:07:55,176 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:07:55,178 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:07:55,181 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:07:55,182 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:07:55,182 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:07:55,183 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:07:55,183 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:07:55,183 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:07:55,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:07:55,184 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:07:55,187 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:07:55,187 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:07:55,226 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:07:55,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 99 transitions, 214 flow [2024-11-10 18:07:55,247 INFO L124 PetriNetUnfolderBase]: 34/192 cut-off events. [2024-11-10 18:07:55,248 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:07:55,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 34/192 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 778 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 114. Up to 8 conditions per place. [2024-11-10 18:07:55,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 99 transitions, 214 flow [2024-11-10 18:07:55,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 99 transitions, 214 flow [2024-11-10 18:07:55,253 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:55,258 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;@7e24a18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:55,258 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:55,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:55,260 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:55,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:55,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:55,260 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:55,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:55,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash 12862317, now seen corresponding path program 1 times [2024-11-10 18:07:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615761277] [2024-11-10 18:07:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615761277] [2024-11-10 18:07:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615761277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451866545] [2024-11-10 18:07:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:55,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:55,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:55,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 99 [2024-11-10 18:07:55,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:55,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:55,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 99 [2024-11-10 18:07:55,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:56,515 INFO L124 PetriNetUnfolderBase]: 4612/9897 cut-off events. [2024-11-10 18:07:56,516 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-10 18:07:56,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17318 conditions, 9897 events. 4612/9897 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 81206 event pairs, 4026 based on Foata normal form. 3418/13036 useless extension candidates. Maximal degree in co-relation 10757. Up to 6443 conditions per place. [2024-11-10 18:07:56,584 INFO L140 encePairwiseOnDemand]: 77/99 looper letters, 63 selfloop transitions, 2 changer transitions 1/100 dead transitions. [2024-11-10 18:07:56,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 348 flow [2024-11-10 18:07:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-10 18:07:56,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6734006734006734 [2024-11-10 18:07:56,590 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 214 flow. Second operand 3 states and 200 transitions. [2024-11-10 18:07:56,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 348 flow [2024-11-10 18:07:56,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 100 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:07:56,595 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 174 flow [2024-11-10 18:07:56,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-11-10 18:07:56,596 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-10 18:07:56,597 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 174 flow [2024-11-10 18:07:56,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:56,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:56,599 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:56,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:07:56,599 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:56,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:56,601 INFO L85 PathProgramCache]: Analyzing trace with hash 12862318, now seen corresponding path program 1 times [2024-11-10 18:07:56,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:56,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842377846] [2024-11-10 18:07:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842377846] [2024-11-10 18:07:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842377846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:56,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741541339] [2024-11-10 18:07:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:56,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:56,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 99 [2024-11-10 18:07:56,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:56,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:56,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 99 [2024-11-10 18:07:56,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:57,740 INFO L124 PetriNetUnfolderBase]: 4314/9715 cut-off events. [2024-11-10 18:07:57,741 INFO L125 PetriNetUnfolderBase]: For 266/289 co-relation queries the response was YES. [2024-11-10 18:07:57,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 9715 events. 4314/9715 cut-off events. For 266/289 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 81974 event pairs, 3669 based on Foata normal form. 1/9116 useless extension candidates. Maximal degree in co-relation 15574. Up to 6850 conditions per place. [2024-11-10 18:07:57,816 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 54 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-11-10 18:07:57,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 312 flow [2024-11-10 18:07:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-10 18:07:57,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5589225589225589 [2024-11-10 18:07:57,818 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 174 flow. Second operand 3 states and 166 transitions. [2024-11-10 18:07:57,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 312 flow [2024-11-10 18:07:57,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:07:57,828 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 184 flow [2024-11-10 18:07:57,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-11-10 18:07:57,829 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-10 18:07:57,829 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 184 flow [2024-11-10 18:07:57,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:57,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:57,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:07:57,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:07:57,830 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:57,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 7014731, now seen corresponding path program 1 times [2024-11-10 18:07:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295559677] [2024-11-10 18:07:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:57,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295559677] [2024-11-10 18:07:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295559677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830845669] [2024-11-10 18:07:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:57,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:57,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:07:57,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:07:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:57,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:07:58,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:07:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:58,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830845669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:58,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-10 18:07:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521398930] [2024-11-10 18:07:58,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:58,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:07:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:07:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:07:58,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 99 [2024-11-10 18:07:58,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:58,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:58,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 99 [2024-11-10 18:07:58,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:59,257 INFO L124 PetriNetUnfolderBase]: 4192/9092 cut-off events. [2024-11-10 18:07:59,257 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-10 18:07:59,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16097 conditions, 9092 events. 4192/9092 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 75512 event pairs, 113 based on Foata normal form. 168/8818 useless extension candidates. Maximal degree in co-relation 11970. Up to 4631 conditions per place. [2024-11-10 18:07:59,316 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 99 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2024-11-10 18:07:59,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 504 flow [2024-11-10 18:07:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:07:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:07:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 281 transitions. [2024-11-10 18:07:59,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5676767676767677 [2024-11-10 18:07:59,319 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 184 flow. Second operand 5 states and 281 transitions. [2024-11-10 18:07:59,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 504 flow [2024-11-10 18:07:59,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:07:59,325 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 190 flow [2024-11-10 18:07:59,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-11-10 18:07:59,327 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-10 18:07:59,327 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 190 flow [2024-11-10 18:07:59,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:59,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:59,328 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-10 18:07:59,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:07:59,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-10 18:07:59,533 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:59,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 271263321, now seen corresponding path program 1 times [2024-11-10 18:07:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799932055] [2024-11-10 18:07:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:59,558 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:07:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:59,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:07:59,581 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:07:59,581 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:07:59,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:07:59,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:07:59,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:07:59,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:07:59,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:07:59,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:07:59,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:07:59,582 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:07:59,584 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:07:59,584 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 18:07:59,618 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:07:59,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 127 transitions, 281 flow [2024-11-10 18:07:59,647 INFO L124 PetriNetUnfolderBase]: 54/301 cut-off events. [2024-11-10 18:07:59,647 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:07:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 301 events. 54/301 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1324 event pairs, 1 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2024-11-10 18:07:59,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 127 transitions, 281 flow [2024-11-10 18:07:59,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 127 transitions, 281 flow [2024-11-10 18:07:59,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:59,655 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;@7e24a18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:59,655 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:59,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:59,657 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:59,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:59,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:59,658 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:59,658 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:07:59,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 16771885, now seen corresponding path program 1 times [2024-11-10 18:07:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:59,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514388461] [2024-11-10 18:07:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:59,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:59,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514388461] [2024-11-10 18:07:59,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514388461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:59,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:59,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192727688] [2024-11-10 18:07:59,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:59,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:59,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:59,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 127 [2024-11-10 18:07:59,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 281 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) [2024-11-10 18:07:59,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:59,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 127 [2024-11-10 18:07:59,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:12,096 INFO L124 PetriNetUnfolderBase]: 86952/150296 cut-off events. [2024-11-10 18:08:12,096 INFO L125 PetriNetUnfolderBase]: For 1646/1646 co-relation queries the response was YES. [2024-11-10 18:08:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272135 conditions, 150296 events. 86952/150296 cut-off events. For 1646/1646 co-relation queries the response was YES. Maximal size of possible extension queue 3323. Compared 1479755 event pairs, 75615 based on Foata normal form. 57883/204331 useless extension candidates. Maximal degree in co-relation 69979. Up to 105165 conditions per place. [2024-11-10 18:08:13,650 INFO L140 encePairwiseOnDemand]: 99/127 looper letters, 87 selfloop transitions, 2 changer transitions 1/133 dead transitions. [2024-11-10 18:08:13,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 473 flow [2024-11-10 18:08:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-10 18:08:13,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6902887139107612 [2024-11-10 18:08:13,656 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 281 flow. Second operand 3 states and 263 transitions. [2024-11-10 18:08:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 473 flow [2024-11-10 18:08:13,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:13,661 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 229 flow [2024-11-10 18:08:13,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2024-11-10 18:08:13,665 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2024-11-10 18:08:13,665 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 229 flow [2024-11-10 18:08:13,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:13,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:13,665 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:13,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:08:13,666 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:13,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 16771886, now seen corresponding path program 1 times [2024-11-10 18:08:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132602407] [2024-11-10 18:08:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:13,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132602407] [2024-11-10 18:08:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132602407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:13,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:13,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932464784] [2024-11-10 18:08:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:13,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:13,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 127 [2024-11-10 18:08:13,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:13,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:13,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 127 [2024-11-10 18:08:13,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:24,457 INFO L124 PetriNetUnfolderBase]: 80824/143114 cut-off events. [2024-11-10 18:08:24,457 INFO L125 PetriNetUnfolderBase]: For 4150/4375 co-relation queries the response was YES. [2024-11-10 18:08:24,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258504 conditions, 143114 events. 80824/143114 cut-off events. For 4150/4375 co-relation queries the response was YES. Maximal size of possible extension queue 3336. Compared 1444032 event pairs, 57600 based on Foata normal form. 1/136618 useless extension candidates. Maximal degree in co-relation 238622. Up to 112052 conditions per place. [2024-11-10 18:08:26,025 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 67 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-11-10 18:08:26,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 112 transitions, 393 flow [2024-11-10 18:08:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2024-11-10 18:08:26,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5406824146981627 [2024-11-10 18:08:26,028 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 229 flow. Second operand 3 states and 206 transitions. [2024-11-10 18:08:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 112 transitions, 393 flow [2024-11-10 18:08:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:26,394 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 239 flow [2024-11-10 18:08:26,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2024-11-10 18:08:26,395 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2024-11-10 18:08:26,395 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 239 flow [2024-11-10 18:08:26,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:26,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:26,395 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:08:26,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:08:26,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:26,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash 917106020, now seen corresponding path program 1 times [2024-11-10 18:08:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:26,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239519757] [2024-11-10 18:08:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:26,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239519757] [2024-11-10 18:08:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239519757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:08:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516445868] [2024-11-10 18:08:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:26,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:08:26,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:08:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:26,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:08:26,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:08:26,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:08:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:26,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:08:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516445868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:08:26,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:08:26,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-10 18:08:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190215471] [2024-11-10 18:08:26,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:08:26,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:08:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:08:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:08:26,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 127 [2024-11-10 18:08:26,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 46.42857142857143) internal successors, (325), 7 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:26,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:26,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 127 [2024-11-10 18:08:26,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:36,664 INFO L124 PetriNetUnfolderBase]: 80702/144894 cut-off events. [2024-11-10 18:08:36,665 INFO L125 PetriNetUnfolderBase]: For 8488/8488 co-relation queries the response was YES. [2024-11-10 18:08:37,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261615 conditions, 144894 events. 80702/144894 cut-off events. For 8488/8488 co-relation queries the response was YES. Maximal size of possible extension queue 3478. Compared 1509729 event pairs, 3581 based on Foata normal form. 1896/141716 useless extension candidates. Maximal degree in co-relation 195870. Up to 79017 conditions per place. [2024-11-10 18:08:37,940 INFO L140 encePairwiseOnDemand]: 122/127 looper letters, 159 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2024-11-10 18:08:37,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 207 transitions, 785 flow [2024-11-10 18:08:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:08:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:08:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 433 transitions. [2024-11-10 18:08:37,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.568241469816273 [2024-11-10 18:08:37,942 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 239 flow. Second operand 6 states and 433 transitions. [2024-11-10 18:08:37,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 207 transitions, 785 flow [2024-11-10 18:08:37,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 207 transitions, 783 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:08:37,953 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 255 flow [2024-11-10 18:08:37,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=255, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2024-11-10 18:08:37,954 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2024-11-10 18:08:37,954 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 255 flow [2024-11-10 18:08:37,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.42857142857143) internal successors, (325), 7 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:37,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:37,955 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-11-10 18:08:37,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:08:38,155 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 [2024-11-10 18:08:38,156 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:38,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2028783356, now seen corresponding path program 1 times [2024-11-10 18:08:38,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:38,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884644315] [2024-11-10 18:08:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:38,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:38,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:08:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:38,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:08:38,191 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:08:38,192 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:08:38,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:08:38,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:08:38,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:08:38,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:08:38,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:08:38,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:08:38,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:08:38,193 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:08:38,194 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:08:38,194 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 18:08:38,229 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 18:08:38,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 155 transitions, 350 flow [2024-11-10 18:08:38,273 INFO L124 PetriNetUnfolderBase]: 86/466 cut-off events. [2024-11-10 18:08:38,273 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-10 18:08:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 466 events. 86/466 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2180 event pairs, 6 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 325. Up to 32 conditions per place. [2024-11-10 18:08:38,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 155 transitions, 350 flow [2024-11-10 18:08:38,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 155 transitions, 350 flow [2024-11-10 18:08:38,287 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:38,287 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;@7e24a18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:38,287 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:08:38,289 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:38,289 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:38,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:38,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:38,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:38,290 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:38,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash 21543405, now seen corresponding path program 1 times [2024-11-10 18:08:38,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557482088] [2024-11-10 18:08:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557482088] [2024-11-10 18:08:38,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557482088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:38,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:38,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:38,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632965890] [2024-11-10 18:08:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:38,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:38,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 155 [2024-11-10 18:08:38,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:38,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:38,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 155 [2024-11-10 18:08:38,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand