./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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_02-simple_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:27:30,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:27:30,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:27:30,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:27:30,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:27:30,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:27:30,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:27:30,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:27:30,806 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:27:30,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:27:30,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:27:30,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:27:30,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:27:30,811 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:27:30,811 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:27:30,811 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:27:30,811 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:27:30,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:27:30,812 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:27:30,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:27:30,812 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:27:30,814 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:27:30,814 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:27:30,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:27:30,815 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:27:30,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:27:30,815 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:27:30,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:27:30,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:27:30,815 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:27:30,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:27:30,816 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:27:30,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:27:30,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:27:30,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:27:30,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:27:30,818 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:27:30,818 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2024-11-17 03:27:31,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:27:31,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:27:31,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:27:31,060 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:27:31,060 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:27:31,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2024-11-17 03:27:32,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:27:32,490 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:27:32,491 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2024-11-17 03:27:32,503 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffd814bfc/7624250990fc410e9f510998b798c63f/FLAGe96c25af3 [2024-11-17 03:27:32,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffd814bfc/7624250990fc410e9f510998b798c63f [2024-11-17 03:27:32,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:27:32,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:27:32,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:27:32,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:27:32,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:27:32,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:27:32" (1/1) ... [2024-11-17 03:27:32,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd8c46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:32, skipping insertion in model container [2024-11-17 03:27:32,868 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:27:32" (1/1) ... [2024-11-17 03:27:32,901 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:27:33,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:27:33,229 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:27:33,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:27:33,310 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:27:33,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33 WrapperNode [2024-11-17 03:27:33,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:27:33,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:27:33,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:27:33,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:27:33,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,350 INFO L138 Inliner]: procedures = 171, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 130 [2024-11-17 03:27:33,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:27:33,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:27:33,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:27:33,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:27:33,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,364 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,382 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-11-17 03:27:33,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,388 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:27:33,394 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:27:33,394 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:27:33,394 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:27:33,395 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (1/1) ... [2024-11-17 03:27:33,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:27:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:27:33,432 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) [2024-11-17 03:27:33,439 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 [2024-11-17 03:27:33,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:27:33,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:27:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:27:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:27:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:27:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:27:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:27:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:27:33,498 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:27:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:27:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:27:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:27:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:27:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:27:33,500 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:27:33,658 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:27:33,660 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:27:33,851 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L707: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-17 03:27:33,851 INFO L1250 $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 [2024-11-17 03:27:33,880 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:27:33,880 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:27:34,061 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:27:34,061 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:27:34,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:27:34 BoogieIcfgContainer [2024-11-17 03:27:34,062 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:27:34,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:27:34,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:27:34,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:27:34,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:27:32" (1/3) ... [2024-11-17 03:27:34,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa3c501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:27:34, skipping insertion in model container [2024-11-17 03:27:34,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:27:33" (2/3) ... [2024-11-17 03:27:34,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa3c501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:27:34, skipping insertion in model container [2024-11-17 03:27:34,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:27:34" (3/3) ... [2024-11-17 03:27:34,069 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2024-11-17 03:27:34,082 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:27:34,082 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-17 03:27:34,082 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:27:34,123 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-17 03:27:34,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 69 transitions, 145 flow [2024-11-17 03:27:34,190 INFO L124 PetriNetUnfolderBase]: 19/107 cut-off events. [2024-11-17 03:27:34,190 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:27:34,194 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. [2024-11-17 03:27:34,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 69 transitions, 145 flow [2024-11-17 03:27:34,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 69 transitions, 145 flow [2024-11-17 03:27:34,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:27:34,213 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;@4160c7e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:27:34,213 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-17 03:27:34,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:27:34,220 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:27:34,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:27:34,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:34,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:34,221 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)] === [2024-11-17 03:27:34,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash 12659854, now seen corresponding path program 1 times [2024-11-17 03:27:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618321734] [2024-11-17 03:27:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:34,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:34,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618321734] [2024-11-17 03:27:34,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618321734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:34,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:34,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:34,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023130921] [2024-11-17 03:27:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:34,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:34,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:34,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-11-17 03:27:34,598 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) [2024-11-17 03:27:34,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:34,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-11-17 03:27:34,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:34,741 INFO L124 PetriNetUnfolderBase]: 127/454 cut-off events. [2024-11-17 03:27:34,741 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:27:34,745 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. [2024-11-17 03:27:34,748 INFO L140 encePairwiseOnDemand]: 53/69 looper letters, 33 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2024-11-17 03:27:34,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 205 flow [2024-11-17 03:27:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-17 03:27:34,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2024-11-17 03:27:34,759 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 145 flow. Second operand 3 states and 137 transitions. [2024-11-17 03:27:34,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 205 flow [2024-11-17 03:27:34,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:27:34,763 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 117 flow [2024-11-17 03:27:34,765 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} [2024-11-17 03:27:34,768 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-11-17 03:27:34,768 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 117 flow [2024-11-17 03:27:34,768 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) [2024-11-17 03:27:34,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:34,768 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:34,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:27:34,769 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)] === [2024-11-17 03:27:34,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 12659855, now seen corresponding path program 1 times [2024-11-17 03:27:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809708297] [2024-11-17 03:27:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:34,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809708297] [2024-11-17 03:27:34,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809708297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:34,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:34,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231335011] [2024-11-17 03:27:34,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:34,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:34,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-11-17 03:27:34,943 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) [2024-11-17 03:27:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-11-17 03:27:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:35,046 INFO L124 PetriNetUnfolderBase]: 126/462 cut-off events. [2024-11-17 03:27:35,046 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-11-17 03:27:35,047 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. [2024-11-17 03:27:35,049 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 35 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-17 03:27:35,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 211 flow [2024-11-17 03:27:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-17 03:27:35,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-11-17 03:27:35,052 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 117 flow. Second operand 3 states and 123 transitions. [2024-11-17 03:27:35,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 211 flow [2024-11-17 03:27:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:27:35,056 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 123 flow [2024-11-17 03:27:35,057 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} [2024-11-17 03:27:35,058 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-11-17 03:27:35,058 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 123 flow [2024-11-17 03:27:35,058 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) [2024-11-17 03:27:35,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:35,059 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:27:35,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:27:35,059 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)] === [2024-11-17 03:27:35,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1842944785, now seen corresponding path program 1 times [2024-11-17 03:27:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74250368] [2024-11-17 03:27:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74250368] [2024-11-17 03:27:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74250368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:27:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521100022] [2024-11-17 03:27:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:27:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:27:35,216 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) [2024-11-17 03:27:35,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:27:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:35,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:27:35,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:27:35,364 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 [2024-11-17 03:27:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:35,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:27:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521100022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:27:35,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:27:35,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:27:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169061196] [2024-11-17 03:27:35,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:27:35,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:27:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:27:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:27:35,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-11-17 03:27:35,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 123 flow. Second operand has 9 states, 9 states have (on average 29.333333333333332) internal successors, (264), 9 states have internal predecessors, (264), 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) [2024-11-17 03:27:35,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:35,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-11-17 03:27:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:35,642 INFO L124 PetriNetUnfolderBase]: 27/101 cut-off events. [2024-11-17 03:27:35,642 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:27:35,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 101 events. 27/101 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 291 event pairs, 0 based on Foata normal form. 20/118 useless extension candidates. Maximal degree in co-relation 172. Up to 57 conditions per place. [2024-11-17 03:27:35,643 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 23 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-17 03:27:35,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 134 flow [2024-11-17 03:27:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:27:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:27:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-17 03:27:35,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-11-17 03:27:35,645 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 123 flow. Second operand 4 states and 135 transitions. [2024-11-17 03:27:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 134 flow [2024-11-17 03:27:35,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:27:35,646 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 60 flow [2024-11-17 03:27:35,646 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} [2024-11-17 03:27:35,646 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -27 predicate places. [2024-11-17 03:27:35,647 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 60 flow [2024-11-17 03:27:35,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.333333333333332) internal successors, (264), 9 states have internal predecessors, (264), 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) [2024-11-17 03:27:35,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:35,647 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-17 03:27:35,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:27:35,851 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 [2024-11-17 03:27:35,852 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)] === [2024-11-17 03:27:35,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1296713851, now seen corresponding path program 1 times [2024-11-17 03:27:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:35,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158613995] [2024-11-17 03:27:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:35,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:35,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:27:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:35,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:27:35,920 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:27:35,921 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-17 03:27:35,923 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-17 03:27:35,923 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-17 03:27:35,923 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-17 03:27:35,924 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-17 03:27:35,924 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-17 03:27:35,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-17 03:27:35,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:27:35,925 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-17 03:27:35,927 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:27:35,927 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:27:35,942 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:27:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 96 transitions, 208 flow [2024-11-17 03:27:35,969 INFO L124 PetriNetUnfolderBase]: 34/187 cut-off events. [2024-11-17 03:27:35,969 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:27:35,970 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. [2024-11-17 03:27:35,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 96 transitions, 208 flow [2024-11-17 03:27:35,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 96 transitions, 208 flow [2024-11-17 03:27:35,972 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:27:35,973 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;@4160c7e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:27:35,973 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-17 03:27:35,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:27:35,976 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:27:35,976 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:27:35,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:35,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:35,976 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)] === [2024-11-17 03:27:35,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 15615118, now seen corresponding path program 1 times [2024-11-17 03:27:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:35,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645371947] [2024-11-17 03:27:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:36,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645371947] [2024-11-17 03:27:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645371947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:36,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783876662] [2024-11-17 03:27:36,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:36,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:36,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:36,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-17 03:27:36,039 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) [2024-11-17 03:27:36,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:36,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-17 03:27:36,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:36,537 INFO L124 PetriNetUnfolderBase]: 2802/5946 cut-off events. [2024-11-17 03:27:36,538 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-17 03:27:36,544 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. [2024-11-17 03:27:36,560 INFO L140 encePairwiseOnDemand]: 74/96 looper letters, 53 selfloop transitions, 2 changer transitions 1/93 dead transitions. [2024-11-17 03:27:36,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 314 flow [2024-11-17 03:27:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2024-11-17 03:27:36,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6909722222222222 [2024-11-17 03:27:36,562 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 208 flow. Second operand 3 states and 199 transitions. [2024-11-17 03:27:36,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 314 flow [2024-11-17 03:27:36,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:27:36,564 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 168 flow [2024-11-17 03:27:36,564 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} [2024-11-17 03:27:36,564 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -1 predicate places. [2024-11-17 03:27:36,565 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 168 flow [2024-11-17 03:27:36,565 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) [2024-11-17 03:27:36,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:36,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:36,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:27:36,565 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)] === [2024-11-17 03:27:36,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 15615119, now seen corresponding path program 1 times [2024-11-17 03:27:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905254740] [2024-11-17 03:27:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:36,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905254740] [2024-11-17 03:27:36,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905254740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:36,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:36,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136507228] [2024-11-17 03:27:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:36,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:36,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-17 03:27:36,646 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) [2024-11-17 03:27:36,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:36,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-17 03:27:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:37,066 INFO L124 PetriNetUnfolderBase]: 2783/6152 cut-off events. [2024-11-17 03:27:37,066 INFO L125 PetriNetUnfolderBase]: For 212/226 co-relation queries the response was YES. [2024-11-17 03:27:37,075 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. [2024-11-17 03:27:37,096 INFO L140 encePairwiseOnDemand]: 92/96 looper letters, 47 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-17 03:27:37,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 288 flow [2024-11-17 03:27:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-17 03:27:37,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-11-17 03:27:37,099 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 168 flow. Second operand 3 states and 165 transitions. [2024-11-17 03:27:37,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 288 flow [2024-11-17 03:27:37,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:27:37,105 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 178 flow [2024-11-17 03:27:37,106 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} [2024-11-17 03:27:37,108 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -1 predicate places. [2024-11-17 03:27:37,108 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 178 flow [2024-11-17 03:27:37,108 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) [2024-11-17 03:27:37,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:37,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:27:37,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:27:37,109 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)] === [2024-11-17 03:27:37,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2096183050, now seen corresponding path program 1 times [2024-11-17 03:27:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942320886] [2024-11-17 03:27:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:37,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942320886] [2024-11-17 03:27:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942320886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:27:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663669605] [2024-11-17 03:27:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:37,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:27:37,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:27:37,246 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) [2024-11-17 03:27:37,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:27:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:37,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:27:37,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:27:37,361 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 [2024-11-17 03:27:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:37,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:27:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:37,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663669605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:27:37,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:27:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:27:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629386099] [2024-11-17 03:27:37,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:27:37,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:27:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:27:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:27:37,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-17 03:27:37,543 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) [2024-11-17 03:27:37,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-17 03:27:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:37,746 INFO L124 PetriNetUnfolderBase]: 657/1438 cut-off events. [2024-11-17 03:27:37,746 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-11-17 03:27:37,748 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. [2024-11-17 03:27:37,752 INFO L140 encePairwiseOnDemand]: 92/96 looper letters, 53 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-17 03:27:37,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 286 flow [2024-11-17 03:27:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:27:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:27:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-11-17 03:27:37,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-17 03:27:37,754 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 178 flow. Second operand 5 states and 245 transitions. [2024-11-17 03:27:37,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 286 flow [2024-11-17 03:27:37,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:27:37,756 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 116 flow [2024-11-17 03:27:37,756 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} [2024-11-17 03:27:37,757 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -24 predicate places. [2024-11-17 03:27:37,758 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 116 flow [2024-11-17 03:27:37,758 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) [2024-11-17 03:27:37,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:37,758 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-17 03:27:37,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:27:37,959 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 [2024-11-17 03:27:37,959 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)] === [2024-11-17 03:27:37,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 604925685, now seen corresponding path program 1 times [2024-11-17 03:27:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965134018] [2024-11-17 03:27:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:37,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:37,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:27:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:37,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:27:37,997 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-17 03:27:37,998 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-17 03:27:37,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:27:37,998 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-17 03:27:37,999 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:27:37,999 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-17 03:27:38,022 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:27:38,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 123 transitions, 273 flow [2024-11-17 03:27:38,039 INFO L124 PetriNetUnfolderBase]: 54/294 cut-off events. [2024-11-17 03:27:38,039 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:27:38,040 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. [2024-11-17 03:27:38,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 123 transitions, 273 flow [2024-11-17 03:27:38,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 123 transitions, 273 flow [2024-11-17 03:27:38,044 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:27:38,045 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;@4160c7e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:27:38,045 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-17 03:27:38,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:27:38,046 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:27:38,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:27:38,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:38,046 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:38,047 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)] === [2024-11-17 03:27:38,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 19401550, now seen corresponding path program 1 times [2024-11-17 03:27:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:38,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550639387] [2024-11-17 03:27:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:38,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550639387] [2024-11-17 03:27:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550639387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897992193] [2024-11-17 03:27:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:38,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:38,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2024-11-17 03:27:38,097 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) [2024-11-17 03:27:38,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:38,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2024-11-17 03:27:38,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:43,358 INFO L124 PetriNetUnfolderBase]: 44558/75955 cut-off events. [2024-11-17 03:27:43,358 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-11-17 03:27:43,504 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. [2024-11-17 03:27:43,769 INFO L140 encePairwiseOnDemand]: 95/123 looper letters, 73 selfloop transitions, 2 changer transitions 1/123 dead transitions. [2024-11-17 03:27:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 123 transitions, 425 flow [2024-11-17 03:27:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2024-11-17 03:27:43,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7073170731707317 [2024-11-17 03:27:43,771 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 273 flow. Second operand 3 states and 261 transitions. [2024-11-17 03:27:43,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 123 transitions, 425 flow [2024-11-17 03:27:43,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:27:43,778 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 221 flow [2024-11-17 03:27:43,779 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} [2024-11-17 03:27:43,779 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2024-11-17 03:27:43,780 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 221 flow [2024-11-17 03:27:43,780 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) [2024-11-17 03:27:43,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:43,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:43,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:27:43,780 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)] === [2024-11-17 03:27:43,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash 19401551, now seen corresponding path program 1 times [2024-11-17 03:27:43,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:43,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792908072] [2024-11-17 03:27:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:43,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792908072] [2024-11-17 03:27:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792908072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:43,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218871622] [2024-11-17 03:27:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:43,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:43,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 123 [2024-11-17 03:27:43,863 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) [2024-11-17 03:27:43,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:43,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 123 [2024-11-17 03:27:43,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:48,816 INFO L124 PetriNetUnfolderBase]: 43801/77090 cut-off events. [2024-11-17 03:27:48,817 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2024-11-17 03:27:48,989 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. [2024-11-17 03:27:49,233 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 58 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2024-11-17 03:27:49,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 106 transitions, 363 flow [2024-11-17 03:27:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:27:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:27:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2024-11-17 03:27:49,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-11-17 03:27:49,238 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 221 flow. Second operand 3 states and 206 transitions. [2024-11-17 03:27:49,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 106 transitions, 363 flow [2024-11-17 03:27:49,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:27:49,501 INFO L231 Difference]: Finished difference. Result has 102 places, 96 transitions, 231 flow [2024-11-17 03:27:49,502 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} [2024-11-17 03:27:49,502 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2024-11-17 03:27:49,502 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 231 flow [2024-11-17 03:27:49,502 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) [2024-11-17 03:27:49,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:49,502 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:27:49,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:27:49,503 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)] === [2024-11-17 03:27:49,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash -404421218, now seen corresponding path program 1 times [2024-11-17 03:27:49,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:49,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800640369] [2024-11-17 03:27:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:49,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800640369] [2024-11-17 03:27:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800640369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:27:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412044080] [2024-11-17 03:27:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:49,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:27:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:27:49,611 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) [2024-11-17 03:27:49,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:27:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:49,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:27:49,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:27:49,729 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 [2024-11-17 03:27:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:49,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:27:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:49,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412044080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:27:49,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:27:49,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:27:49,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263951266] [2024-11-17 03:27:49,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:27:49,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:27:49,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:49,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:27:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:27:49,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2024-11-17 03:27:49,884 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) [2024-11-17 03:27:49,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:49,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2024-11-17 03:27:49,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:27:50,980 INFO L124 PetriNetUnfolderBase]: 10557/18515 cut-off events. [2024-11-17 03:27:50,981 INFO L125 PetriNetUnfolderBase]: For 4047/4047 co-relation queries the response was YES. [2024-11-17 03:27:51,017 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. [2024-11-17 03:27:51,075 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 92 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2024-11-17 03:27:51,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 476 flow [2024-11-17 03:27:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:27:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:27:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2024-11-17 03:27:51,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-11-17 03:27:51,077 INFO L175 Difference]: Start difference. First operand has 102 places, 96 transitions, 231 flow. Second operand 6 states and 384 transitions. [2024-11-17 03:27:51,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 476 flow [2024-11-17 03:27:51,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:27:51,080 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 168 flow [2024-11-17 03:27:51,080 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} [2024-11-17 03:27:51,081 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -23 predicate places. [2024-11-17 03:27:51,081 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 168 flow [2024-11-17 03:27:51,081 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) [2024-11-17 03:27:51,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:51,081 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-11-17 03:27:51,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:27:51,282 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 [2024-11-17 03:27:51,282 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)] === [2024-11-17 03:27:51,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1724163578, now seen corresponding path program 1 times [2024-11-17 03:27:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:51,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20990876] [2024-11-17 03:27:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:51,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:51,305 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:27:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:27:51,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:27:51,326 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-17 03:27:51,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-17 03:27:51,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:27:51,327 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-17 03:27:51,327 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:27:51,329 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-17 03:27:51,352 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:27:51,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 150 transitions, 340 flow [2024-11-17 03:27:51,377 INFO L124 PetriNetUnfolderBase]: 86/457 cut-off events. [2024-11-17 03:27:51,377 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-17 03:27:51,380 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. [2024-11-17 03:27:51,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 150 transitions, 340 flow [2024-11-17 03:27:51,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 150 transitions, 340 flow [2024-11-17 03:27:51,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:27:51,385 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;@4160c7e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:27:51,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-17 03:27:51,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:27:51,387 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:27:51,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:27:51,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:27:51,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:27:51,387 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)] === [2024-11-17 03:27:51,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:27:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 24019150, now seen corresponding path program 1 times [2024-11-17 03:27:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:27:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515106595] [2024-11-17 03:27:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:27:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:27:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515106595] [2024-11-17 03:27:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515106595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:27:51,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:27:51,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:27:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146549051] [2024-11-17 03:27:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:27:51,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:27:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:27:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:27:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:27:51,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 150 [2024-11-17 03:27:51,444 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) [2024-11-17 03:27:51,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:27:51,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 150 [2024-11-17 03:27:51,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand