./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.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_01-simple_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:07:46,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:07:46,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:07:46,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:07:46,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:07:46,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:07:46,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:07:46,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:07:46,288 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:07:46,289 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:07:46,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:07:46,289 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:07:46,290 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:07:46,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:07:46,291 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:07:46,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:07:46,292 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:07:46,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:07:46,292 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:07:46,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:07:46,292 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:07:46,296 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:07:46,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:07:46,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:07:46,297 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:07:46,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:07:46,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:07:46,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:07:46,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:07:46,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:07:46,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:07:46,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2024-11-10 18:07:46,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:07:46,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:07:46,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:07:46,550 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:07:46,551 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:07:46,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2024-11-10 18:07:48,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:07:48,401 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:07:48,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2024-11-10 18:07:48,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93212c64/e646e2e1d97c4bc8ace4bce7c3fb654e/FLAGa840827a8 [2024-11-10 18:07:48,436 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93212c64/e646e2e1d97c4bc8ace4bce7c3fb654e [2024-11-10 18:07:48,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:07:48,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:07:48,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:07:48,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:07:48,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:07:48,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:48,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9ecdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48, skipping insertion in model container [2024-11-10 18:07:48,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:48,497 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:07:48,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:07:48,866 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:07:48,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:07:48,968 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:07:48,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48 WrapperNode [2024-11-10 18:07:48,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:07:48,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:07:48,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:07:48,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:07:48,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:48,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,010 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-11-10 18:07:49,011 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:07:49,012 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:07:49,012 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:07:49,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:07:49,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,026 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,042 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 2, 5]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 0, 5]. The 1 writes are split as follows [0, 0, 0, 1, 0]. [2024-11-10 18:07:49,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,050 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,058 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:07:49,060 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:07:49,060 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:07:49,060 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:07:49,061 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (1/1) ... [2024-11-10 18:07:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:07:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:49,102 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 18:07:49,118 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 18:07:49,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:07:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:07:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:07:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:07:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-10 18:07:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:07:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:07:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:07:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:07:49,176 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:07:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-10 18:07:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:07:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:07:49,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:07:49,180 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 18:07:49,346 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:07:49,350 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:07:49,547 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L707: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:07:49,547 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L707-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:07:49,593 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:07:49,593 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:07:49,739 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:07:49,739 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:07:49,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:07:49 BoogieIcfgContainer [2024-11-10 18:07:49,740 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:07:49,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:07:49,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:07:49,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:07:49,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:07:48" (1/3) ... [2024-11-10 18:07:49,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a650eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:07:49, skipping insertion in model container [2024-11-10 18:07:49,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:07:48" (2/3) ... [2024-11-10 18:07:49,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a650eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:07:49, skipping insertion in model container [2024-11-10 18:07:49,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:07:49" (3/3) ... [2024-11-10 18:07:49,753 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2024-11-10 18:07:49,772 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:07:49,772 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-10 18:07:49,772 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:07:49,818 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:07:49,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 69 transitions, 145 flow [2024-11-10 18:07:49,926 INFO L124 PetriNetUnfolderBase]: 19/107 cut-off events. [2024-11-10 18:07:49,926 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:07:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 107 events. 19/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 394 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2024-11-10 18:07:49,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 69 transitions, 145 flow [2024-11-10 18:07:49,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 69 transitions, 145 flow [2024-11-10 18:07:49,946 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:49,952 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;@3d440d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:49,952 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:49,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:49,981 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:49,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:49,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:49,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:49,983 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 18:07:49,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 9581454, now seen corresponding path program 1 times [2024-11-10 18:07:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159289096] [2024-11-10 18:07:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:50,195 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 18:07:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159289096] [2024-11-10 18:07:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159289096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:50,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768179184] [2024-11-10 18:07:50,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:50,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:50,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:50,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-11-10 18:07:50,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 145 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 18:07:50,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:50,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-11-10 18:07:50,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:50,440 INFO L124 PetriNetUnfolderBase]: 127/454 cut-off events. [2024-11-10 18:07:50,441 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:07:50,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 454 events. 127/454 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2392 event pairs, 108 based on Foata normal form. 152/588 useless extension candidates. Maximal degree in co-relation 693. Up to 252 conditions per place. [2024-11-10 18:07:50,445 INFO L140 encePairwiseOnDemand]: 53/69 looper letters, 33 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2024-11-10 18:07:50,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 205 flow [2024-11-10 18:07:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-10 18:07:50,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2024-11-10 18:07:50,462 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 145 flow. Second operand 3 states and 137 transitions. [2024-11-10 18:07:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 205 flow [2024-11-10 18:07:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:07:50,467 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 117 flow [2024-11-10 18:07:50,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-10 18:07:50,472 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-11-10 18:07:50,472 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 117 flow [2024-11-10 18:07:50,472 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 18:07:50,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:50,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:50,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:07:50,475 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 18:07:50,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:50,476 INFO L85 PathProgramCache]: Analyzing trace with hash 9581455, now seen corresponding path program 1 times [2024-11-10 18:07:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111232715] [2024-11-10 18:07:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:50,697 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 18:07:50,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111232715] [2024-11-10 18:07:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111232715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:50,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749772909] [2024-11-10 18:07:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:50,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:50,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-11-10 18:07:50,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 18:07:50,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:50,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-11-10 18:07:50,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:50,848 INFO L124 PetriNetUnfolderBase]: 126/462 cut-off events. [2024-11-10 18:07:50,848 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-11-10 18:07:50,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 462 events. 126/462 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2370 event pairs, 117 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 732. Up to 270 conditions per place. [2024-11-10 18:07:50,853 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 35 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-10 18:07:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 211 flow [2024-11-10 18:07:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-10 18:07:50,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-11-10 18:07:50,856 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 117 flow. Second operand 3 states and 123 transitions. [2024-11-10 18:07:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 211 flow [2024-11-10 18:07:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:07:50,860 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 123 flow [2024-11-10 18:07:50,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-10 18:07:50,862 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-11-10 18:07:50,862 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 123 flow [2024-11-10 18:07:50,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 18:07:50,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:50,864 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:07:50,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:07:50,864 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 18:07:50,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1796977491, now seen corresponding path program 1 times [2024-11-10 18:07:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:50,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782880510] [2024-11-10 18:07:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:51,066 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 18:07:51,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:51,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782880510] [2024-11-10 18:07:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782880510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568177293] [2024-11-10 18:07:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:51,076 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 18:07:51,091 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 18:07:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:51,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:07:51,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:51,253 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 18:07:51,355 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 18:07:51,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:51,457 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 18:07:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568177293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:51,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-10 18:07:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506214830] [2024-11-10 18:07:51,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:51,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:07:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:07:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:07:51,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-11-10 18:07:51,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:51,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:51,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-11-10 18:07:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:51,590 INFO L124 PetriNetUnfolderBase]: 27/104 cut-off events. [2024-11-10 18:07:51,590 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-10 18:07:51,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 104 events. 27/104 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 16 based on Foata normal form. 20/123 useless extension candidates. Maximal degree in co-relation 182. Up to 57 conditions per place. [2024-11-10 18:07:51,591 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 23 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-10 18:07:51,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 134 flow [2024-11-10 18:07:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:07:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:07:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-10 18:07:51,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-11-10 18:07:51,593 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 123 flow. Second operand 4 states and 135 transitions. [2024-11-10 18:07:51,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 134 flow [2024-11-10 18:07:51,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:07:51,595 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 60 flow [2024-11-10 18:07:51,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-11-10 18:07:51,596 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -27 predicate places. [2024-11-10 18:07:51,596 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 60 flow [2024-11-10 18:07:51,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:51,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:51,597 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-10 18:07:51,626 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 18:07:51,797 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 18:07:51,798 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 18:07:51,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash 128272891, now seen corresponding path program 1 times [2024-11-10 18:07:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825776713] [2024-11-10 18:07:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:51,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:07:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:51,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:07:51,856 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:07:51,857 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:07:51,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:07:51,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:07:51,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:07:51,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:07:51,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:07:51,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:07:51,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:07:51,862 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:07:51,866 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:07:51,866 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:07:51,882 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:07:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 96 transitions, 208 flow [2024-11-10 18:07:51,900 INFO L124 PetriNetUnfolderBase]: 34/187 cut-off events. [2024-11-10 18:07:51,901 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:07:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 187 events. 34/187 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 752 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 8 conditions per place. [2024-11-10 18:07:51,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 96 transitions, 208 flow [2024-11-10 18:07:51,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 96 transitions, 208 flow [2024-11-10 18:07:51,910 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:51,910 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;@3d440d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:51,911 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:51,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:51,914 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:51,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:51,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:51,915 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:51,915 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 18:07:51,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 12536718, now seen corresponding path program 1 times [2024-11-10 18:07:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:51,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629402548] [2024-11-10 18:07:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:51,971 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 18:07:51,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629402548] [2024-11-10 18:07:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629402548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:51,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991162106] [2024-11-10 18:07:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:51,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:51,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-10 18:07:51,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 18:07:51,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:51,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-10 18:07:51,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:52,656 INFO L124 PetriNetUnfolderBase]: 2802/5946 cut-off events. [2024-11-10 18:07:52,656 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-10 18:07:52,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10531 conditions, 5946 events. 2802/5946 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 46793 event pairs, 2394 based on Foata normal form. 2492/8226 useless extension candidates. Maximal degree in co-relation 7677. Up to 3889 conditions per place. [2024-11-10 18:07:52,701 INFO L140 encePairwiseOnDemand]: 74/96 looper letters, 53 selfloop transitions, 2 changer transitions 1/93 dead transitions. [2024-11-10 18:07:52,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 314 flow [2024-11-10 18:07:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2024-11-10 18:07:52,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6909722222222222 [2024-11-10 18:07:52,705 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 208 flow. Second operand 3 states and 199 transitions. [2024-11-10 18:07:52,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 314 flow [2024-11-10 18:07:52,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:07:52,707 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 168 flow [2024-11-10 18:07:52,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-11-10 18:07:52,708 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -1 predicate places. [2024-11-10 18:07:52,709 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 168 flow [2024-11-10 18:07:52,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 18:07:52,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:52,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:52,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:07:52,710 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 18:07:52,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 12536719, now seen corresponding path program 1 times [2024-11-10 18:07:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447917394] [2024-11-10 18:07:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:52,762 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 18:07:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:52,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447917394] [2024-11-10 18:07:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447917394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:52,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917620110] [2024-11-10 18:07:52,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:52,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:52,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-10 18:07:52,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:52,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:52,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-10 18:07:52,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:53,363 INFO L124 PetriNetUnfolderBase]: 2783/6152 cut-off events. [2024-11-10 18:07:53,363 INFO L125 PetriNetUnfolderBase]: For 212/226 co-relation queries the response was YES. [2024-11-10 18:07:53,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10811 conditions, 6152 events. 2783/6152 cut-off events. For 212/226 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 49978 event pairs, 2599 based on Foata normal form. 1/5725 useless extension candidates. Maximal degree in co-relation 9943. Up to 4467 conditions per place. [2024-11-10 18:07:53,408 INFO L140 encePairwiseOnDemand]: 92/96 looper letters, 47 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-10 18:07:53,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 288 flow [2024-11-10 18:07:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:07:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:07:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-10 18:07:53,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-11-10 18:07:53,412 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 168 flow. Second operand 3 states and 165 transitions. [2024-11-10 18:07:53,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 288 flow [2024-11-10 18:07:53,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:07:53,423 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 178 flow [2024-11-10 18:07:53,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-11-10 18:07:53,426 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -1 predicate places. [2024-11-10 18:07:53,426 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 178 flow [2024-11-10 18:07:53,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:53,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:53,427 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:07:53,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:07:53,427 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 18:07:53,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1543739226, now seen corresponding path program 1 times [2024-11-10 18:07:53,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:53,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021539914] [2024-11-10 18:07:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:53,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:53,562 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 18:07:53,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:53,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021539914] [2024-11-10 18:07:53,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021539914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:53,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783203301] [2024-11-10 18:07:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:53,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:53,655 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 18:07:53,666 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 18:07:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:53,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:07:53,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:53,764 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 18:07:53,832 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 18:07:53,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:53,902 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 18:07:53,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783203301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:53,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:53,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:07:53,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030384196] [2024-11-10 18:07:53,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:53,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:07:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:07:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:07:53,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-10 18:07:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-10 18:07:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:54,234 INFO L124 PetriNetUnfolderBase]: 657/1438 cut-off events. [2024-11-10 18:07:54,234 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-11-10 18:07:54,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 1438 events. 657/1438 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 8678 event pairs, 256 based on Foata normal form. 220/1639 useless extension candidates. Maximal degree in co-relation 2343. Up to 840 conditions per place. [2024-11-10 18:07:54,244 INFO L140 encePairwiseOnDemand]: 92/96 looper letters, 53 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-10 18:07:54,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 286 flow [2024-11-10 18:07:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:07:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:07:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-11-10 18:07:54,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-10 18:07:54,246 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 178 flow. Second operand 5 states and 245 transitions. [2024-11-10 18:07:54,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 286 flow [2024-11-10 18:07:54,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:07:54,249 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 116 flow [2024-11-10 18:07:54,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-11-10 18:07:54,250 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -24 predicate places. [2024-11-10 18:07:54,250 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 116 flow [2024-11-10 18:07:54,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:54,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:54,251 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-10 18:07:54,270 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 18:07:54,452 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 18:07:54,452 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 18:07:54,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:54,453 INFO L85 PathProgramCache]: Analyzing trace with hash 875050513, now seen corresponding path program 1 times [2024-11-10 18:07:54,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:54,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004124713] [2024-11-10 18:07:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:54,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:07:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:07:54,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:07:54,501 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:07:54,503 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:07:54,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:07:54,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:07:54,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:07:54,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:07:54,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:07:54,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:07:54,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:07:54,505 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:07:54,505 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:07:54,505 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 18:07:54,541 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:07:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 123 transitions, 273 flow [2024-11-10 18:07:54,574 INFO L124 PetriNetUnfolderBase]: 54/294 cut-off events. [2024-11-10 18:07:54,574 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:07:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 294 events. 54/294 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1263 event pairs, 1 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 198. Up to 16 conditions per place. [2024-11-10 18:07:54,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 123 transitions, 273 flow [2024-11-10 18:07:54,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 123 transitions, 273 flow [2024-11-10 18:07:54,582 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:07:54,583 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;@3d440d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:07:54,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:07:54,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:07:54,585 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:07:54,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:07:54,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:54,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:07:54,586 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 18:07:54,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 16323150, now seen corresponding path program 1 times [2024-11-10 18:07:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:54,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731526934] [2024-11-10 18:07:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:54,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:54,616 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 18:07:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731526934] [2024-11-10 18:07:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731526934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:54,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:07:54,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:07:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896683552] [2024-11-10 18:07:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:54,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:07:54,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:07:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:07:54,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2024-11-10 18:07:54,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:07:54,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:54,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2024-11-10 18:07:54,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:02,255 INFO L124 PetriNetUnfolderBase]: 44558/75955 cut-off events. [2024-11-10 18:08:02,256 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-11-10 18:08:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139188 conditions, 75955 events. 44558/75955 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 1971. Compared 703706 event pairs, 37891 based on Foata normal form. 35640/109295 useless extension candidates. Maximal degree in co-relation 50689. Up to 53237 conditions per place. [2024-11-10 18:08:02,894 INFO L140 encePairwiseOnDemand]: 95/123 looper letters, 73 selfloop transitions, 2 changer transitions 1/123 dead transitions. [2024-11-10 18:08:02,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 123 transitions, 425 flow [2024-11-10 18:08:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2024-11-10 18:08:02,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7073170731707317 [2024-11-10 18:08:02,897 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 273 flow. Second operand 3 states and 261 transitions. [2024-11-10 18:08:02,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 123 transitions, 425 flow [2024-11-10 18:08:02,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:02,903 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 221 flow [2024-11-10 18:08:02,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-11-10 18:08:02,904 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2024-11-10 18:08:02,904 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 221 flow [2024-11-10 18:08:02,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:02,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:02,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:02,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:08:02,905 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 18:08:02,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 16323151, now seen corresponding path program 1 times [2024-11-10 18:08:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334846005] [2024-11-10 18:08:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:02,961 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 18:08:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:02,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334846005] [2024-11-10 18:08:02,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334846005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:02,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:02,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993934653] [2024-11-10 18:08:02,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:02,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:02,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:02,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 123 [2024-11-10 18:08:02,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:02,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:02,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 123 [2024-11-10 18:08:02,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:09,933 INFO L124 PetriNetUnfolderBase]: 43801/77090 cut-off events. [2024-11-10 18:08:09,933 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2024-11-10 18:08:10,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140449 conditions, 77090 events. 43801/77090 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 2074. Compared 742875 event pairs, 28324 based on Foata normal form. 1/73399 useless extension candidates. Maximal degree in co-relation 128782. Up to 61215 conditions per place. [2024-11-10 18:08:10,585 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 58 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2024-11-10 18:08:10,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 106 transitions, 363 flow [2024-11-10 18:08:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2024-11-10 18:08:10,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-11-10 18:08:10,588 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 221 flow. Second operand 3 states and 206 transitions. [2024-11-10 18:08:10,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 106 transitions, 363 flow [2024-11-10 18:08:10,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:10,734 INFO L231 Difference]: Finished difference. Result has 102 places, 96 transitions, 231 flow [2024-11-10 18:08:10,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2024-11-10 18:08:10,737 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2024-11-10 18:08:10,738 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 231 flow [2024-11-10 18:08:10,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:10,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:10,739 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:08:10,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:08:10,739 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 18:08:10,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 250623802, now seen corresponding path program 1 times [2024-11-10 18:08:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:10,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124758949] [2024-11-10 18:08:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:10,859 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 18:08:10,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:10,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124758949] [2024-11-10 18:08:10,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124758949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:08:10,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291381836] [2024-11-10 18:08:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:10,868 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 18:08:10,872 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 18:08:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:10,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:08:10,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:08:10,973 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 18:08:11,047 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 18:08:11,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:08:11,119 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 18:08:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291381836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:08:11,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:08:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:08:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753794332] [2024-11-10 18:08:11,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:08:11,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:08:11,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:08:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:08:11,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2024-11-10 18:08:11,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 231 flow. Second operand has 9 states, 9 states have (on average 49.333333333333336) internal successors, (444), 9 states have internal predecessors, (444), 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 18:08:11,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:11,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2024-11-10 18:08:11,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:13,272 INFO L124 PetriNetUnfolderBase]: 10557/18515 cut-off events. [2024-11-10 18:08:13,272 INFO L125 PetriNetUnfolderBase]: For 4047/4047 co-relation queries the response was YES. [2024-11-10 18:08:13,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35075 conditions, 18515 events. 10557/18515 cut-off events. For 4047/4047 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 150157 event pairs, 1696 based on Foata normal form. 2220/20589 useless extension candidates. Maximal degree in co-relation 31403. Up to 11100 conditions per place. [2024-11-10 18:08:13,470 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 92 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2024-11-10 18:08:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 476 flow [2024-11-10 18:08:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:08:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:08:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2024-11-10 18:08:13,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-11-10 18:08:13,476 INFO L175 Difference]: Start difference. First operand has 102 places, 96 transitions, 231 flow. Second operand 6 states and 384 transitions. [2024-11-10 18:08:13,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 476 flow [2024-11-10 18:08:13,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:08:13,481 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 168 flow [2024-11-10 18:08:13,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2024-11-10 18:08:13,482 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -23 predicate places. [2024-11-10 18:08:13,482 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 168 flow [2024-11-10 18:08:13,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.333333333333336) internal successors, (444), 9 states have internal predecessors, (444), 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 18:08:13,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:13,483 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-11-10 18:08:13,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:08:13,684 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 18:08:13,685 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 18:08:13,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1019660538, now seen corresponding path program 1 times [2024-11-10 18:08:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115698377] [2024-11-10 18:08:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:13,710 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:08:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:13,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:08:13,738 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:08:13,738 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:08:13,739 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:08:13,739 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:08:13,739 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:08:13,739 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:08:13,741 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:08:13,741 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:08:13,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:08:13,741 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:08:13,742 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:08:13,742 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 18:08:13,776 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 18:08:13,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 150 transitions, 340 flow [2024-11-10 18:08:13,816 INFO L124 PetriNetUnfolderBase]: 86/457 cut-off events. [2024-11-10 18:08:13,817 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-10 18:08:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 457 events. 86/457 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2138 event pairs, 6 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 318. Up to 32 conditions per place. [2024-11-10 18:08:13,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 150 transitions, 340 flow [2024-11-10 18:08:13,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 150 transitions, 340 flow [2024-11-10 18:08:13,830 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:13,830 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;@3d440d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:13,830 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:08:13,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:13,832 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:13,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:13,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:13,832 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:13,832 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 18:08:13,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash 20940750, now seen corresponding path program 1 times [2024-11-10 18:08:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:13,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617340429] [2024-11-10 18:08:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:13,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:13,872 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 18:08:13,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:13,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617340429] [2024-11-10 18:08:13,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617340429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:13,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:13,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:13,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018189128] [2024-11-10 18:08:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:13,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:13,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 150 [2024-11-10 18:08:13,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 18:08:13,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:13,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 150 [2024-11-10 18:08:13,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand