./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_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_87-lists_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 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:30:01,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:30:01,077 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:30:01,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:30:01,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:30:01,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:30:01,114 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:30:01,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:30:01,115 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:30:01,115 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:30:01,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:30:01,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:30:01,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:30:01,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:30:01,117 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:30:01,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:30:01,118 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:30:01,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:30:01,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:30:01,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:30:01,119 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:30:01,124 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:30:01,125 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:30:01,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:30:01,125 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:30:01,125 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:30:01,126 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:30:01,126 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:30:01,126 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:30:01,126 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:30:01,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:30:01,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:30:01,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:30:01,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:30:01,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:30:01,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:30:01,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:30:01,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:30:01,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:30:01,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:30:01,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:30:01,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:30:01,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2024-11-17 03:30:01,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:30:01,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:30:01,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:30:01,412 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:30:01,412 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:30:01,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-11-17 03:30:02,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:30:03,175 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:30:03,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-11-17 03:30:03,201 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c2c06ea/2be44f46e9414b048aca91301fe545e3/FLAG31ff05ae0 [2024-11-17 03:30:03,216 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c2c06ea/2be44f46e9414b048aca91301fe545e3 [2024-11-17 03:30:03,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:30:03,221 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:30:03,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:30:03,223 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:30:03,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:30:03,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:03" (1/1) ... [2024-11-17 03:30:03,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611c7354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:03, skipping insertion in model container [2024-11-17 03:30:03,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:03" (1/1) ... [2024-11-17 03:30:03,278 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:30:03,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:30:04,026 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:30:04,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:30:04,222 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:30:04,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04 WrapperNode [2024-11-17 03:30:04,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:30:04,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:30:04,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:30:04,225 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:30:04,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,367 INFO L138 Inliner]: procedures = 280, calls = 1605, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1777 [2024-11-17 03:30:04,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:30:04,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:30:04,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:30:04,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:30:04,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,404 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,460 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 259, 2, 5, 1280, 2, 14]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 256, 0, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 1, 1, 0, 0, 1, 8]. [2024-11-17 03:30:04,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,509 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:30:04,558 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:30:04,558 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:30:04,558 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:30:04,559 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (1/1) ... [2024-11-17 03:30:04,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:30:04,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:04,597 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 03:30:04,603 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 03:30:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:30:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 03:30:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 03:30:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-17 03:30:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-17 03:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-17 03:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-17 03:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-17 03:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-17 03:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-17 03:30:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-17 03:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 03:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 03:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-17 03:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-17 03:30:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-17 03:30:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-17 03:30:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-17 03:30:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-17 03:30:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-17 03:30:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-17 03:30:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-17 03:30:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-17 03:30:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-17 03:30:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:30:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:30:04,664 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 03:30:04,899 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:30:04,901 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:30:06,935 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1051: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2024-11-17 03:30:06,935 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1051-1: SUMMARY for call ULTIMATE.dealloc(main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset); srcloc: null [2024-11-17 03:30:06,936 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1052: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2024-11-17 03:30:06,936 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1052-1: SUMMARY for call ULTIMATE.dealloc(main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset); srcloc: null [2024-11-17 03:30:06,938 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:30:06,938 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:30:46,482 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:30:46,482 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:30:46,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:46 BoogieIcfgContainer [2024-11-17 03:30:46,483 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:30:46,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:30:46,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:30:46,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:30:46,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:30:03" (1/3) ... [2024-11-17 03:30:46,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb3db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:46, skipping insertion in model container [2024-11-17 03:30:46,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:04" (2/3) ... [2024-11-17 03:30:46,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb3db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:46, skipping insertion in model container [2024-11-17 03:30:46,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:46" (3/3) ... [2024-11-17 03:30:46,498 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-11-17 03:30:46,519 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:30:46,520 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-17 03:30:46,521 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:30:46,651 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:30:46,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:46,843 INFO L124 PetriNetUnfolderBase]: 54/339 cut-off events. [2024-11-17 03:30:46,843 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:30:46,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 339 events. 54/339 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1793 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2024-11-17 03:30:46,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:46,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:46,876 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:30:46,885 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;@1c69131f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:30:46,885 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-17 03:30:46,931 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:30:46,931 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:30:46,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:30:46,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:46,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:46,933 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:46,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:46,939 INFO L85 PathProgramCache]: Analyzing trace with hash 116060630, now seen corresponding path program 1 times [2024-11-17 03:30:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145174270] [2024-11-17 03:30:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:48,355 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 03:30:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145174270] [2024-11-17 03:30:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145174270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211809320] [2024-11-17 03:30:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:48,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:48,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:48,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 163 [2024-11-17 03:30:48,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 163 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 03:30:48,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:48,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 163 [2024-11-17 03:30:48,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:49,494 INFO L124 PetriNetUnfolderBase]: 3268/7777 cut-off events. [2024-11-17 03:30:49,494 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-11-17 03:30:49,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13069 conditions, 7777 events. 3268/7777 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 67611 event pairs, 3059 based on Foata normal form. 1600/8532 useless extension candidates. Maximal degree in co-relation 11529. Up to 5189 conditions per place. [2024-11-17 03:30:49,565 INFO L140 encePairwiseOnDemand]: 141/163 looper letters, 57 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-11-17 03:30:49,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 142 transitions, 422 flow [2024-11-17 03:30:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2024-11-17 03:30:49,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6707566462167689 [2024-11-17 03:30:49,580 INFO L175 Difference]: Start difference. First operand has 143 places, 163 transitions, 346 flow. Second operand 3 states and 328 transitions. [2024-11-17 03:30:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 142 transitions, 422 flow [2024-11-17 03:30:49,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:30:49,591 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 308 flow [2024-11-17 03:30:49,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2024-11-17 03:30:49,600 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, -1 predicate places. [2024-11-17 03:30:49,600 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 308 flow [2024-11-17 03:30:49,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 03:30:49,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:49,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:49,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:30:49,601 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:49,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash 116060631, now seen corresponding path program 1 times [2024-11-17 03:30:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:49,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662274695] [2024-11-17 03:30:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:50,644 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 03:30:50,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:50,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662274695] [2024-11-17 03:30:50,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662274695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:50,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:50,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432871135] [2024-11-17 03:30:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:50,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:50,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 163 [2024-11-17 03:30:50,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:50,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:50,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 163 [2024-11-17 03:30:50,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:51,573 INFO L124 PetriNetUnfolderBase]: 3268/7775 cut-off events. [2024-11-17 03:30:51,573 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-11-17 03:30:51,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13069 conditions, 7775 events. 3268/7775 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 67501 event pairs, 3059 based on Foata normal form. 2/6932 useless extension candidates. Maximal degree in co-relation 13053. Up to 5189 conditions per place. [2024-11-17 03:30:51,647 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 56 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2024-11-17 03:30:51,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 140 transitions, 420 flow [2024-11-17 03:30:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2024-11-17 03:30:51,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6380368098159509 [2024-11-17 03:30:51,652 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 308 flow. Second operand 3 states and 312 transitions. [2024-11-17 03:30:51,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 140 transitions, 420 flow [2024-11-17 03:30:51,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 140 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:51,660 INFO L231 Difference]: Finished difference. Result has 140 places, 140 transitions, 304 flow [2024-11-17 03:30:51,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=140, PETRI_TRANSITIONS=140} [2024-11-17 03:30:51,663 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, -3 predicate places. [2024-11-17 03:30:51,663 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 140 transitions, 304 flow [2024-11-17 03:30:51,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:51,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:51,663 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:30:51,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:30:51,664 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:51,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -134766902, now seen corresponding path program 1 times [2024-11-17 03:30:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466740087] [2024-11-17 03:30:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:52,555 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 03:30:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466740087] [2024-11-17 03:30:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466740087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483382865] [2024-11-17 03:30:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:52,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:52,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 163 [2024-11-17 03:30:52,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 140 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 03:30:52,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:52,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 163 [2024-11-17 03:30:52,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:53,976 INFO L124 PetriNetUnfolderBase]: 4064/9587 cut-off events. [2024-11-17 03:30:53,977 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-17 03:30:53,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 9587 events. 4064/9587 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 85494 event pairs, 2177 based on Foata normal form. 0/8615 useless extension candidates. Maximal degree in co-relation 16320. Up to 3708 conditions per place. [2024-11-17 03:30:54,031 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 130 selfloop transitions, 4 changer transitions 0/212 dead transitions. [2024-11-17 03:30:54,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 212 transitions, 716 flow [2024-11-17 03:30:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:30:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:30:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2024-11-17 03:30:54,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7162576687116564 [2024-11-17 03:30:54,034 INFO L175 Difference]: Start difference. First operand has 140 places, 140 transitions, 304 flow. Second operand 4 states and 467 transitions. [2024-11-17 03:30:54,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 212 transitions, 716 flow [2024-11-17 03:30:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:54,046 INFO L231 Difference]: Finished difference. Result has 143 places, 141 transitions, 330 flow [2024-11-17 03:30:54,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=143, PETRI_TRANSITIONS=141} [2024-11-17 03:30:54,049 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 0 predicate places. [2024-11-17 03:30:54,049 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 141 transitions, 330 flow [2024-11-17 03:30:54,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 03:30:54,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:54,050 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:30:54,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:30:54,051 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:54,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -134766901, now seen corresponding path program 1 times [2024-11-17 03:30:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580307014] [2024-11-17 03:30:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:54,896 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 03:30:54,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580307014] [2024-11-17 03:30:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580307014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:54,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:54,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424551151] [2024-11-17 03:30:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:54,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:55,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 163 [2024-11-17 03:30:55,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 141 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 03:30:55,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:55,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 163 [2024-11-17 03:30:55,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:56,250 INFO L124 PetriNetUnfolderBase]: 4084/9982 cut-off events. [2024-11-17 03:30:56,250 INFO L125 PetriNetUnfolderBase]: For 1613/1640 co-relation queries the response was YES. [2024-11-17 03:30:56,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17870 conditions, 9982 events. 4084/9982 cut-off events. For 1613/1640 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 91230 event pairs, 3767 based on Foata normal form. 0/8949 useless extension candidates. Maximal degree in co-relation 16013. Up to 6646 conditions per place. [2024-11-17 03:30:56,317 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 65 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-11-17 03:30:56,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 144 transitions, 470 flow [2024-11-17 03:30:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-11-17 03:30:56,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339468302658486 [2024-11-17 03:30:56,320 INFO L175 Difference]: Start difference. First operand has 143 places, 141 transitions, 330 flow. Second operand 3 states and 310 transitions. [2024-11-17 03:30:56,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 144 transitions, 470 flow [2024-11-17 03:30:56,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 144 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:56,330 INFO L231 Difference]: Finished difference. Result has 145 places, 142 transitions, 342 flow [2024-11-17 03:30:56,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=145, PETRI_TRANSITIONS=142} [2024-11-17 03:30:56,332 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 2 predicate places. [2024-11-17 03:30:56,333 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 142 transitions, 342 flow [2024-11-17 03:30:56,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 03:30:56,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:56,334 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2024-11-17 03:30:56,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:30:56,336 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:56,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash 931633339, now seen corresponding path program 1 times [2024-11-17 03:30:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:56,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587823983] [2024-11-17 03:30:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:57,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:57,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587823983] [2024-11-17 03:30:57,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587823983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:57,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093782225] [2024-11-17 03:30:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:57,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:57,710 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 03:30:57,711 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 03:30:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:58,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 3791 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:30:58,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:58,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:30:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:58,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:30:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:58,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:58,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:30:58,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:30:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:58,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093782225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:58,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:58,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-17 03:30:58,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135214093] [2024-11-17 03:30:58,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:58,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:30:58,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:30:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:31:00,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 163 [2024-11-17 03:31:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 142 transitions, 342 flow. Second operand has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 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 03:31:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:00,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 163 [2024-11-17 03:31:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:01,416 INFO L124 PetriNetUnfolderBase]: 4086/10001 cut-off events. [2024-11-17 03:31:01,417 INFO L125 PetriNetUnfolderBase]: For 1079/1106 co-relation queries the response was YES. [2024-11-17 03:31:01,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17914 conditions, 10001 events. 4086/10001 cut-off events. For 1079/1106 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 91304 event pairs, 3767 based on Foata normal form. 1/8970 useless extension candidates. Maximal degree in co-relation 17891. Up to 6648 conditions per place. [2024-11-17 03:31:01,489 INFO L140 encePairwiseOnDemand]: 157/163 looper letters, 72 selfloop transitions, 8 changer transitions 0/157 dead transitions. [2024-11-17 03:31:01,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 157 transitions, 542 flow [2024-11-17 03:31:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:31:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:31:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2024-11-17 03:31:01,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5687992988606485 [2024-11-17 03:31:01,491 INFO L175 Difference]: Start difference. First operand has 145 places, 142 transitions, 342 flow. Second operand 7 states and 649 transitions. [2024-11-17 03:31:01,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 157 transitions, 542 flow [2024-11-17 03:31:01,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:01,498 INFO L231 Difference]: Finished difference. Result has 154 places, 148 transitions, 398 flow [2024-11-17 03:31:01,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2024-11-17 03:31:01,501 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 11 predicate places. [2024-11-17 03:31:01,501 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 398 flow [2024-11-17 03:31:01,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 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 03:31:01,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:01,502 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:01,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:01,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:01,707 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:31:01,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1497544530, now seen corresponding path program 1 times [2024-11-17 03:31:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948558162] [2024-11-17 03:31:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:31:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948558162] [2024-11-17 03:31:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948558162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587505669] [2024-11-17 03:31:02,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:02,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:31:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:31:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:31:02,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 163 [2024-11-17 03:31:02,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 03:31:02,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:02,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 163 [2024-11-17 03:31:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:03,032 INFO L124 PetriNetUnfolderBase]: 4444/10563 cut-off events. [2024-11-17 03:31:03,033 INFO L125 PetriNetUnfolderBase]: For 925/952 co-relation queries the response was YES. [2024-11-17 03:31:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19026 conditions, 10563 events. 4444/10563 cut-off events. For 925/952 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 96976 event pairs, 2895 based on Foata normal form. 0/9571 useless extension candidates. Maximal degree in co-relation 18967. Up to 4462 conditions per place. [2024-11-17 03:31:03,096 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 101 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2024-11-17 03:31:03,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 680 flow [2024-11-17 03:31:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2024-11-17 03:31:03,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7034764826175869 [2024-11-17 03:31:03,098 INFO L175 Difference]: Start difference. First operand has 154 places, 148 transitions, 398 flow. Second operand 3 states and 344 transitions. [2024-11-17 03:31:03,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 680 flow [2024-11-17 03:31:03,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 676 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:03,105 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 398 flow [2024-11-17 03:31:03,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2024-11-17 03:31:03,106 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 10 predicate places. [2024-11-17 03:31:03,106 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 398 flow [2024-11-17 03:31:03,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 03:31:03,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:03,106 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:03,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:31:03,107 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:31:03,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:03,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1497544531, now seen corresponding path program 1 times [2024-11-17 03:31:03,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:03,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697588279] [2024-11-17 03:31:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:03,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:03,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:03,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697588279] [2024-11-17 03:31:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697588279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:03,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104237174] [2024-11-17 03:31:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:03,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:03,445 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 03:31:03,447 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 03:31:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:04,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 3831 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:31:04,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:04,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104237174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:04,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:31:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610252682] [2024-11-17 03:31:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:04,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:31:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:31:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:31:04,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 163 [2024-11-17 03:31:04,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 398 flow. Second operand has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 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 03:31:04,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:04,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 163 [2024-11-17 03:31:04,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:04,985 INFO L124 PetriNetUnfolderBase]: 3973/9782 cut-off events. [2024-11-17 03:31:04,985 INFO L125 PetriNetUnfolderBase]: For 1520/1595 co-relation queries the response was YES. [2024-11-17 03:31:05,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17671 conditions, 9782 events. 3973/9782 cut-off events. For 1520/1595 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 89209 event pairs, 3660 based on Foata normal form. 4/8783 useless extension candidates. Maximal degree in co-relation 17608. Up to 6452 conditions per place. [2024-11-17 03:31:05,044 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 69 selfloop transitions, 8 changer transitions 0/155 dead transitions. [2024-11-17 03:31:05,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 155 transitions, 574 flow [2024-11-17 03:31:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:31:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:31:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 759 transitions. [2024-11-17 03:31:05,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5820552147239264 [2024-11-17 03:31:05,047 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 398 flow. Second operand 8 states and 759 transitions. [2024-11-17 03:31:05,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 155 transitions, 574 flow [2024-11-17 03:31:05,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 155 transitions, 564 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:05,053 INFO L231 Difference]: Finished difference. Result has 163 places, 146 transitions, 422 flow [2024-11-17 03:31:05,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=163, PETRI_TRANSITIONS=146} [2024-11-17 03:31:05,054 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 20 predicate places. [2024-11-17 03:31:05,054 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 146 transitions, 422 flow [2024-11-17 03:31:05,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 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 03:31:05,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:05,055 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1] [2024-11-17 03:31:05,082 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 03:31:05,255 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 03:31:05,256 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:31:05,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1690929867, now seen corresponding path program 2 times [2024-11-17 03:31:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034711175] [2024-11-17 03:31:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034711175] [2024-11-17 03:31:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034711175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208449545] [2024-11-17 03:31:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:07,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:07,133 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 03:31:07,135 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 03:31:07,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:31:07,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:07,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 4019 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-17 03:31:07,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:07,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:31:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:07,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:31:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:07,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:31:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:08,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:31:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:08,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:31:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:08,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:08,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:08,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:31:08,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:08,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:31:08,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:08,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:31:08,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:08,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:31:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208449545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:09,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-17 03:31:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208251513] [2024-11-17 03:31:09,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:09,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-17 03:31:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-17 03:31:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992