./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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 ../../../trunk/examples/svcomp/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.graphml --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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:02:13,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:02:13,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:02:13,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:02:13,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:02:13,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:02:13,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:02:13,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:02:13,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:02:13,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:02:13,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:02:13,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:02:13,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:02:13,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:02:13,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:02:13,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:02:13,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:02:13,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:02:13,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:02:13,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:02:13,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:02:13,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:02:13,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:02:13,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:02:13,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:02:13,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:02:13,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:02:13,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:02:13,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:02:13,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:02:13,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:02:13,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:02:13,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:02:13,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:02:13,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:02:13,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:02:13,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:02:13,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:02:13,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:02:13,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:02:13,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:02:13,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:02:13,390 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:02:13,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:02:13,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:02:13,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:02:13,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:02:13,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:02:13,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:02:13,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:02:13,394 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:02:13,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:02:13,395 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:02:13,395 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:02:13,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:02:13,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:02:13,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:02:13,396 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:02:13,396 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:02:13,396 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:02:13,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:02:13,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:02:13,397 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:02:13,397 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:02:13,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:02:13,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:02:13,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:02:13,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:13,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:02:13,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:02:13,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:02:13,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:02:13,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:02:13,399 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:02:13,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:02:13,399 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:02:13,400 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:02:13,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:02:13,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:02:13,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:02:13,719 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:02:13,719 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:02:13,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-08-30 04:02:14,896 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:02:15,182 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:02:15,190 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-08-30 04:02:15,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49ecd26e/fe6f68fe26084d108e461829e8f667c9/FLAG8beb60f93 [2023-08-30 04:02:15,225 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49ecd26e/fe6f68fe26084d108e461829e8f667c9 [2023-08-30 04:02:15,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:02:15,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:02:15,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:15,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:02:15,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:02:15,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f36583c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15, skipping insertion in model container [2023-08-30 04:02:15,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:02:15,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:02:15,595 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-08-30 04:02:15,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:15,639 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:02:15,687 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-08-30 04:02:15,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:15,744 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:02:15,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15 WrapperNode [2023-08-30 04:02:15,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:15,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:15,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:02:15,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:02:15,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,809 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-08-30 04:02:15,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:15,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:02:15,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:02:15,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:02:15,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:02:15,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:02:15,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:02:15,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:02:15,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:15,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:02:15,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:02:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:02:15,943 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:02:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:02:15,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:02:15,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:02:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:02:15,945 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:02:16,139 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:02:16,141 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:02:16,397 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:02:16,404 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:02:16,404 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:02:16,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:16 BoogieIcfgContainer [2023-08-30 04:02:16,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:02:16,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:02:16,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:02:16,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:02:16,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:02:15" (1/3) ... [2023-08-30 04:02:16,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49abe508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:16, skipping insertion in model container [2023-08-30 04:02:16,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (2/3) ... [2023-08-30 04:02:16,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49abe508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:16, skipping insertion in model container [2023-08-30 04:02:16,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:16" (3/3) ... [2023-08-30 04:02:16,413 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-08-30 04:02:16,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:02:16,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:02:16,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:02:16,485 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:02:16,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,603 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-08-30 04:02:16,604 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-08-30 04:02:16,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,619 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:16,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 116 transitions, 240 flow [2023-08-30 04:02:16,694 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-08-30 04:02:16,694 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:16,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-08-30 04:02:16,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-30 04:02:19,742 INFO L134 LiptonReduction]: Checked pairs total: 4703 [2023-08-30 04:02:19,743 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-30 04:02:19,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:19,761 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1ff36449, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:19,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:19,764 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:02:19,765 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:19,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:19,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:19,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:19,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash 14182, now seen corresponding path program 1 times [2023-08-30 04:02:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763831122] [2023-08-30 04:02:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:20,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763831122] [2023-08-30 04:02:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763831122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:20,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968386617] [2023-08-30 04:02:20,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:20,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 216 [2023-08-30 04:02:20,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2023-08-30 04:02:20,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:20,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 216 [2023-08-30 04:02:20,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:20,285 INFO L130 PetriNetUnfolder]: 113/273 cut-off events. [2023-08-30 04:02:20,285 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:20,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 273 events. 113/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1080 event pairs, 96 based on Foata normal form. 25/227 useless extension candidates. Maximal degree in co-relation 501. Up to 227 conditions per place. [2023-08-30 04:02:20,288 INFO L137 encePairwiseOnDemand]: 202/216 looper letters, 30 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2023-08-30 04:02:20,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 148 flow [2023-08-30 04:02:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-30 04:02:20,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-30 04:02:20,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-30 04:02:20,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-30 04:02:20,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:20,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-30 04:02:20,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2023-08-30 04:02:20,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-30 04:02:20,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-30 04:02:20,316 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 333 transitions. [2023-08-30 04:02:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 148 flow [2023-08-30 04:02:20,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:20,321 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2023-08-30 04:02:20,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 04:02:20,326 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:02:20,326 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2023-08-30 04:02:20,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2023-08-30 04:02:20,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:20,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:02:20,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:20,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 14183, now seen corresponding path program 1 times [2023-08-30 04:02:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107081215] [2023-08-30 04:02:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107081215] [2023-08-30 04:02:20,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107081215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:20,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:20,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860121375] [2023-08-30 04:02:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2023-08-30 04:02:20,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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) [2023-08-30 04:02:20,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:20,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2023-08-30 04:02:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:20,557 INFO L130 PetriNetUnfolder]: 96/230 cut-off events. [2023-08-30 04:02:20,558 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:20,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 230 events. 96/230 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 997 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2023-08-30 04:02:20,560 INFO L137 encePairwiseOnDemand]: 212/216 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 04:02:20,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 148 flow [2023-08-30 04:02:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-30 04:02:20,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2023-08-30 04:02:20,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-30 04:02:20,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-30 04:02:20,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:20,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-30 04:02:20,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-30 04:02:20,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-30 04:02:20,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-30 04:02:20,567 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 326 transitions. [2023-08-30 04:02:20,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 148 flow [2023-08-30 04:02:20,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:20,569 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2023-08-30 04:02:20,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 04:02:20,570 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 04:02:20,571 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2023-08-30 04:02:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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) [2023-08-30 04:02:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:20,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:02:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:02:20,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:20,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 422779783, now seen corresponding path program 1 times [2023-08-30 04:02:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:20,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259574303] [2023-08-30 04:02:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:20,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:20,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259574303] [2023-08-30 04:02:20,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259574303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:20,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984288936] [2023-08-30 04:02:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:20,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:20,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:20,678 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) [2023-08-30 04:02:20,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:02:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:20,798 INFO L350 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 6 treesize of output 5 [2023-08-30 04:02:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984288936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:20,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:20,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:02:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445955626] [2023-08-30 04:02:20,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:02:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:02:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:02:20,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 216 [2023-08-30 04:02:20,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 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) [2023-08-30 04:02:20,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:20,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 216 [2023-08-30 04:02:20,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:21,030 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2023-08-30 04:02:21,031 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:02:21,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-30 04:02:21,032 INFO L137 encePairwiseOnDemand]: 212/216 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:02:21,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2023-08-30 04:02:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:02:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:02:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-08-30 04:02:21,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2023-08-30 04:02:21,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-08-30 04:02:21,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-08-30 04:02:21,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:21,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-08-30 04:02:21,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2023-08-30 04:02:21,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 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) [2023-08-30 04:02:21,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 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) [2023-08-30 04:02:21,044 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 399 transitions. [2023-08-30 04:02:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2023-08-30 04:02:21,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:02:21,046 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2023-08-30 04:02:21,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-30 04:02:21,047 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -12 predicate places. [2023-08-30 04:02:21,048 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2023-08-30 04:02:21,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 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) [2023-08-30 04:02:21,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:21,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:02:21,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:02:21,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:21,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:21,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 221271635, now seen corresponding path program 1 times [2023-08-30 04:02:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:21,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385177908] [2023-08-30 04:02:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:21,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:21,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:21,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:21,299 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:21,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:21,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:21,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:21,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:21,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:21,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:21,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:21,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:02:21,304 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:21,306 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:21,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:02:21,323 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:02:21,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,348 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 04:02:21,348 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:02:21,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 04:02:21,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:21,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 146 transitions, 310 flow [2023-08-30 04:02:21,390 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-08-30 04:02:21,391 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:02:21,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 04:02:21,397 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-30 04:02:24,443 INFO L134 LiptonReduction]: Checked pairs total: 19209 [2023-08-30 04:02:24,448 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-30 04:02:24,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:24,455 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1ff36449, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:24,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:24,457 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:24,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:24,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:24,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:24,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:24,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash 23295, now seen corresponding path program 1 times [2023-08-30 04:02:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:24,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426330301] [2023-08-30 04:02:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426330301] [2023-08-30 04:02:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426330301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923762118] [2023-08-30 04:02:24,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:24,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 255 [2023-08-30 04:02:24,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2023-08-30 04:02:24,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:24,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 255 [2023-08-30 04:02:24,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:24,918 INFO L130 PetriNetUnfolder]: 1980/3504 cut-off events. [2023-08-30 04:02:24,919 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 04:02:24,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 3504 events. 1980/3504 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22186 event pairs, 952 based on Foata normal form. 769/3573 useless extension candidates. Maximal degree in co-relation 908. Up to 3241 conditions per place. [2023-08-30 04:02:24,936 INFO L137 encePairwiseOnDemand]: 236/255 looper letters, 41 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2023-08-30 04:02:24,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 220 flow [2023-08-30 04:02:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-30 04:02:24,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-30 04:02:24,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-30 04:02:24,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-30 04:02:24,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:24,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-30 04:02:24,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-30 04:02:24,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-08-30 04:02:24,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-08-30 04:02:24,943 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 425 transitions. [2023-08-30 04:02:24,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 220 flow [2023-08-30 04:02:24,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:24,946 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 122 flow [2023-08-30 04:02:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-30 04:02:24,947 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 04:02:24,947 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 122 flow [2023-08-30 04:02:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2023-08-30 04:02:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:24,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:02:24,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:24,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash 23294, now seen corresponding path program 1 times [2023-08-30 04:02:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799285755] [2023-08-30 04:02:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:24,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:24,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799285755] [2023-08-30 04:02:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799285755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:24,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881031833] [2023-08-30 04:02:24,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:25,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 255 [2023-08-30 04:02:25,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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) [2023-08-30 04:02:25,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:25,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 255 [2023-08-30 04:02:25,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:25,241 INFO L130 PetriNetUnfolder]: 1500/2696 cut-off events. [2023-08-30 04:02:25,241 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-30 04:02:25,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 2696 events. 1500/2696 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16265 event pairs, 1368 based on Foata normal form. 0/2347 useless extension candidates. Maximal degree in co-relation 5377. Up to 2265 conditions per place. [2023-08-30 04:02:25,257 INFO L137 encePairwiseOnDemand]: 251/255 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 04:02:25,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 240 flow [2023-08-30 04:02:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-30 04:02:25,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2023-08-30 04:02:25,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-30 04:02:25,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-30 04:02:25,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:25,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-30 04:02:25,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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) [2023-08-30 04:02:25,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-08-30 04:02:25,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-08-30 04:02:25,278 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 122 flow. Second operand 3 states and 396 transitions. [2023-08-30 04:02:25,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 240 flow [2023-08-30 04:02:25,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:02:25,280 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 120 flow [2023-08-30 04:02:25,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-30 04:02:25,281 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:02:25,282 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 120 flow [2023-08-30 04:02:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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) [2023-08-30 04:02:25,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:25,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:02:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:02:25,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:25,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash 54716265, now seen corresponding path program 1 times [2023-08-30 04:02:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:25,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655211870] [2023-08-30 04:02:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:25,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655211870] [2023-08-30 04:02:25,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655211870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673994007] [2023-08-30 04:02:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:25,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:25,365 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) [2023-08-30 04:02:25,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:02:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:25,434 INFO L350 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 6 treesize of output 5 [2023-08-30 04:02:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:25,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:25,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673994007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:25,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:25,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:02:25,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107077447] [2023-08-30 04:02:25,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:25,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:02:25,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:02:25,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:02:25,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-30 04:02:25,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 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) [2023-08-30 04:02:25,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:25,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-30 04:02:25,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:25,799 INFO L130 PetriNetUnfolder]: 286/595 cut-off events. [2023-08-30 04:02:25,799 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 04:02:25,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 595 events. 286/595 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3034 event pairs, 0 based on Foata normal form. 70/664 useless extension candidates. Maximal degree in co-relation 1310. Up to 346 conditions per place. [2023-08-30 04:02:25,803 INFO L137 encePairwiseOnDemand]: 251/255 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-30 04:02:25,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 208 flow [2023-08-30 04:02:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:02:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:02:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 621 transitions. [2023-08-30 04:02:25,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48705882352941177 [2023-08-30 04:02:25,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 621 transitions. [2023-08-30 04:02:25,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 621 transitions. [2023-08-30 04:02:25,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:25,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 621 transitions. [2023-08-30 04:02:25,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.2) internal successors, (621), 5 states have internal predecessors, (621), 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) [2023-08-30 04:02:25,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 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) [2023-08-30 04:02:25,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 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) [2023-08-30 04:02:25,812 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 120 flow. Second operand 5 states and 621 transitions. [2023-08-30 04:02:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 208 flow [2023-08-30 04:02:25,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:02:25,817 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 83 flow [2023-08-30 04:02:25,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 04:02:25,818 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2023-08-30 04:02:25,818 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 83 flow [2023-08-30 04:02:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 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) [2023-08-30 04:02:25,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:25,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:02:25,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:26,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 04:02:26,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:26,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1233205990, now seen corresponding path program 1 times [2023-08-30 04:02:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726710521] [2023-08-30 04:02:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:26,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:26,039 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:26,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:26,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:26,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:26,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:26,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:26,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:26,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:26,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:26,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:26,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:02:26,059 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:26,059 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:26,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:02:26,076 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:02:26,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,113 INFO L130 PetriNetUnfolder]: 50/395 cut-off events. [2023-08-30 04:02:26,113 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:02:26,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 395 events. 50/395 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 04:02:26,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:26,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-08-30 04:02:26,161 INFO L130 PetriNetUnfolder]: 50/395 cut-off events. [2023-08-30 04:02:26,162 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:02:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 395 events. 50/395 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-08-30 04:02:26,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-30 04:02:29,353 INFO L134 LiptonReduction]: Checked pairs total: 39334 [2023-08-30 04:02:29,354 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 04:02:29,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:29,356 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1ff36449, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:29,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:29,357 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:29,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:29,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:29,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:29,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:29,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash 33955, now seen corresponding path program 1 times [2023-08-30 04:02:29,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:29,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76048780] [2023-08-30 04:02:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:29,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76048780] [2023-08-30 04:02:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76048780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:29,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:29,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987082592] [2023-08-30 04:02:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:29,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:29,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 303 [2023-08-30 04:02:29,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-30 04:02:29,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:29,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 303 [2023-08-30 04:02:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:33,741 INFO L130 PetriNetUnfolder]: 35207/52727 cut-off events. [2023-08-30 04:02:33,742 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-08-30 04:02:33,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103137 conditions, 52727 events. 35207/52727 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 380083 event pairs, 22873 based on Foata normal form. 10455/55436 useless extension candidates. Maximal degree in co-relation 8674. Up to 49660 conditions per place. [2023-08-30 04:02:34,055 INFO L137 encePairwiseOnDemand]: 279/303 looper letters, 55 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-30 04:02:34,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 286 flow [2023-08-30 04:02:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 04:02:34,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55995599559956 [2023-08-30 04:02:34,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 04:02:34,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 04:02:34,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:34,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 04:02:34,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2023-08-30 04:02:34,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:34,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:34,063 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 509 transitions. [2023-08-30 04:02:34,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 286 flow [2023-08-30 04:02:34,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:34,067 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 160 flow [2023-08-30 04:02:34,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-30 04:02:34,068 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-30 04:02:34,069 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 160 flow [2023-08-30 04:02:34,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-30 04:02:34,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:34,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:02:34,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:34,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash 33956, now seen corresponding path program 1 times [2023-08-30 04:02:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:34,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135265916] [2023-08-30 04:02:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:34,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135265916] [2023-08-30 04:02:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135265916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:34,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:34,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454104992] [2023-08-30 04:02:34,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:34,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:34,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:34,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:34,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 303 [2023-08-30 04:02:34,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2023-08-30 04:02:34,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:34,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 303 [2023-08-30 04:02:34,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:36,637 INFO L130 PetriNetUnfolder]: 28311/42030 cut-off events. [2023-08-30 04:02:36,638 INFO L131 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2023-08-30 04:02:36,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85175 conditions, 42030 events. 28311/42030 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 291456 event pairs, 25801 based on Foata normal form. 0/37982 useless extension candidates. Maximal degree in co-relation 85103. Up to 36555 conditions per place. [2023-08-30 04:02:36,879 INFO L137 encePairwiseOnDemand]: 299/303 looper letters, 67 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:02:36,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 342 flow [2023-08-30 04:02:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-30 04:02:36,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324532453245324 [2023-08-30 04:02:36,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-30 04:02:36,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-30 04:02:36,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:36,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-30 04:02:36,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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) [2023-08-30 04:02:36,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:36,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:36,886 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 160 flow. Second operand 3 states and 484 transitions. [2023-08-30 04:02:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 342 flow [2023-08-30 04:02:36,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:02:36,890 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 158 flow [2023-08-30 04:02:36,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 04:02:36,893 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-30 04:02:36,893 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 158 flow [2023-08-30 04:02:36,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2023-08-30 04:02:36,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:36,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:02:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:02:36,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:36,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1322818559, now seen corresponding path program 1 times [2023-08-30 04:02:36,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:36,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420307402] [2023-08-30 04:02:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:36,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420307402] [2023-08-30 04:02:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420307402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:36,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425768594] [2023-08-30 04:02:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:36,992 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) [2023-08-30 04:02:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:02:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:37,077 INFO L350 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 6 treesize of output 5 [2023-08-30 04:02:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:37,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:37,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425768594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:37,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:37,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:02:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925713220] [2023-08-30 04:02:37,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:02:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:02:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:02:37,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 303 [2023-08-30 04:02:37,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 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) [2023-08-30 04:02:37,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:37,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 303 [2023-08-30 04:02:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:39,525 INFO L130 PetriNetUnfolder]: 26682/39083 cut-off events. [2023-08-30 04:02:39,526 INFO L131 PetriNetUnfolder]: For 3854/3854 co-relation queries the response was YES. [2023-08-30 04:02:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82462 conditions, 39083 events. 26682/39083 cut-off events. For 3854/3854 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 273002 event pairs, 1192 based on Foata normal form. 9/37163 useless extension candidates. Maximal degree in co-relation 74351. Up to 29667 conditions per place. [2023-08-30 04:02:39,755 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 126 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-30 04:02:39,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 144 transitions, 606 flow [2023-08-30 04:02:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:02:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:02:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 964 transitions. [2023-08-30 04:02:39,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302530253025303 [2023-08-30 04:02:39,761 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 964 transitions. [2023-08-30 04:02:39,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 964 transitions. [2023-08-30 04:02:39,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:39,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 964 transitions. [2023-08-30 04:02:39,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.66666666666666) internal successors, (964), 6 states have internal predecessors, (964), 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) [2023-08-30 04:02:39,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-30 04:02:39,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-08-30 04:02:39,768 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 158 flow. Second operand 6 states and 964 transitions. [2023-08-30 04:02:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 144 transitions, 606 flow [2023-08-30 04:02:40,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 144 transitions, 600 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:40,006 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 172 flow [2023-08-30 04:02:40,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-30 04:02:40,007 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-30 04:02:40,008 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 172 flow [2023-08-30 04:02:40,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 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) [2023-08-30 04:02:40,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:40,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:02:40,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:40,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:40,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:40,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2076128757, now seen corresponding path program 1 times [2023-08-30 04:02:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815908602] [2023-08-30 04:02:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:02:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815908602] [2023-08-30 04:02:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815908602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:40,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:40,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655568513] [2023-08-30 04:02:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:40,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:40,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 303 [2023-08-30 04:02:40,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-30 04:02:40,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:40,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 303 [2023-08-30 04:02:40,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:42,380 INFO L130 PetriNetUnfolder]: 26592/39608 cut-off events. [2023-08-30 04:02:42,380 INFO L131 PetriNetUnfolder]: For 6765/6765 co-relation queries the response was YES. [2023-08-30 04:02:42,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82421 conditions, 39608 events. 26592/39608 cut-off events. For 6765/6765 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 270971 event pairs, 11377 based on Foata normal form. 0/37684 useless extension candidates. Maximal degree in co-relation 44377. Up to 36552 conditions per place. [2023-08-30 04:02:42,575 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 66 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-30 04:02:42,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 394 flow [2023-08-30 04:02:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-30 04:02:42,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302530253025303 [2023-08-30 04:02:42,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-30 04:02:42,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-30 04:02:42,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:42,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-30 04:02:42,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-30 04:02:42,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:42,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-08-30 04:02:42,581 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 172 flow. Second operand 3 states and 482 transitions. [2023-08-30 04:02:42,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 394 flow [2023-08-30 04:02:42,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:42,588 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 191 flow [2023-08-30 04:02:42,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-30 04:02:42,589 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-30 04:02:42,589 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 191 flow [2023-08-30 04:02:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-30 04:02:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:42,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:02:42,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:02:42,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:42,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2095978477, now seen corresponding path program 1 times [2023-08-30 04:02:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:42,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115679187] [2023-08-30 04:02:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:42,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:42,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:42,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:42,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:42,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:42,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:42,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:42,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:42,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:42,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:42,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:02:42,637 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:02:42,638 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:42,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:02:42,670 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:02:42,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,739 INFO L130 PetriNetUnfolder]: 81/619 cut-off events. [2023-08-30 04:02:42,739 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:02:42,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 619 events. 81/619 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2497 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 415. Up to 32 conditions per place. [2023-08-30 04:02:42,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:42,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 206 transitions, 456 flow [2023-08-30 04:02:42,801 INFO L130 PetriNetUnfolder]: 81/619 cut-off events. [2023-08-30 04:02:42,801 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:02:42,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 619 events. 81/619 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2497 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 415. Up to 32 conditions per place. [2023-08-30 04:02:42,815 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-30 04:02:46,057 INFO L134 LiptonReduction]: Checked pairs total: 66742 [2023-08-30 04:02:46,057 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 04:02:46,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:46,059 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1ff36449, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:46,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:46,061 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:02:46,061 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:46,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:46,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:46,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:46,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash 45964, now seen corresponding path program 1 times [2023-08-30 04:02:46,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:46,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829962529] [2023-08-30 04:02:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:46,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829962529] [2023-08-30 04:02:46,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829962529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:46,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:46,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657160832] [2023-08-30 04:02:46,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:46,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:46,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:46,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 345 [2023-08-30 04:02:46,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-08-30 04:02:46,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:46,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 345 [2023-08-30 04:02:46,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:17,756 INFO L130 PetriNetUnfolder]: 334361/463402 cut-off events. [2023-08-30 04:03:17,756 INFO L131 PetriNetUnfolder]: For 11952/11952 co-relation queries the response was YES. [2023-08-30 04:03:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907979 conditions, 463402 events. 334361/463402 cut-off events. For 11952/11952 co-relation queries the response was YES. Maximal size of possible extension queue 10409. Compared 3725800 event pairs, 272380 based on Foata normal form. 84243/488724 useless extension candidates. Maximal degree in co-relation 87206. Up to 437888 conditions per place. [2023-08-30 04:03:20,211 INFO L137 encePairwiseOnDemand]: 314/345 looper letters, 61 selfloop transitions, 2 changer transitions 2/83 dead transitions. [2023-08-30 04:03:20,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 340 flow [2023-08-30 04:03:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-30 04:03:20,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5690821256038647 [2023-08-30 04:03:20,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-30 04:03:20,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-30 04:03:20,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:20,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-30 04:03:20,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 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) [2023-08-30 04:03:20,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2023-08-30 04:03:20,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2023-08-30 04:03:20,218 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 589 transitions. [2023-08-30 04:03:20,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 340 flow [2023-08-30 04:03:20,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:03:20,224 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 200 flow [2023-08-30 04:03:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-08-30 04:03:20,225 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-30 04:03:20,225 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 200 flow [2023-08-30 04:03:20,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-08-30 04:03:20,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:20,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:03:20,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:20,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 45965, now seen corresponding path program 1 times [2023-08-30 04:03:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942370639] [2023-08-30 04:03:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:20,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942370639] [2023-08-30 04:03:20,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942370639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:20,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491630054] [2023-08-30 04:03:20,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:20,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 345 [2023-08-30 04:03:20,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-30 04:03:20,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:20,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 345 [2023-08-30 04:03:20,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:43,586 INFO L130 PetriNetUnfolder]: 253367/351476 cut-off events. [2023-08-30 04:03:43,586 INFO L131 PetriNetUnfolder]: For 22372/22372 co-relation queries the response was YES. [2023-08-30 04:03:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705777 conditions, 351476 events. 253367/351476 cut-off events. For 22372/22372 co-relation queries the response was YES. Maximal size of possible extension queue 7910. Compared 2760938 event pairs, 229706 based on Foata normal form. 0/323755 useless extension candidates. Maximal degree in co-relation 705709. Up to 301807 conditions per place. [2023-08-30 04:03:45,804 INFO L137 encePairwiseOnDemand]: 341/345 looper letters, 79 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 04:03:45,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 416 flow [2023-08-30 04:03:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-30 04:03:45,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5429951690821256 [2023-08-30 04:03:45,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-30 04:03:45,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-30 04:03:45,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:45,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-30 04:03:45,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2023-08-30 04:03:45,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2023-08-30 04:03:45,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2023-08-30 04:03:45,814 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 200 flow. Second operand 3 states and 562 transitions. [2023-08-30 04:03:45,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 416 flow [2023-08-30 04:03:45,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:03:45,823 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 198 flow [2023-08-30 04:03:45,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-08-30 04:03:45,824 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:03:45,824 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 198 flow [2023-08-30 04:03:45,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-30 04:03:45,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:45,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:03:45,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:03:45,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:45,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -463203630, now seen corresponding path program 1 times [2023-08-30 04:03:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415451638] [2023-08-30 04:03:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:45,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:45,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415451638] [2023-08-30 04:03:45,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415451638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:03:45,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862384190] [2023-08-30 04:03:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:45,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:45,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:45,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:03:45,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:03:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:03:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:03:45,985 INFO L350 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 6 treesize of output 5 [2023-08-30 04:03:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:46,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:03:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:46,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862384190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:03:46,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:03:46,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:03:46,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879408875] [2023-08-30 04:03:46,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:03:46,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:03:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:46,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:03:46,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:03:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 345 [2023-08-30 04:03:46,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 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) [2023-08-30 04:03:46,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:46,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 345 [2023-08-30 04:03:46,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:06,355 INFO L130 PetriNetUnfolder]: 227813/309435 cut-off events. [2023-08-30 04:04:06,356 INFO L131 PetriNetUnfolder]: For 25217/25217 co-relation queries the response was YES. [2023-08-30 04:04:07,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634905 conditions, 309435 events. 227813/309435 cut-off events. For 25217/25217 co-relation queries the response was YES. Maximal size of possible extension queue 6978. Compared 2301311 event pairs, 36187 based on Foata normal form. 584/298096 useless extension candidates. Maximal degree in co-relation 567339. Up to 225005 conditions per place. [2023-08-30 04:04:08,448 INFO L137 encePairwiseOnDemand]: 339/345 looper letters, 150 selfloop transitions, 7 changer transitions 0/175 dead transitions. [2023-08-30 04:04:08,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 175 transitions, 724 flow [2023-08-30 04:04:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:04:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:04:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1277 transitions. [2023-08-30 04:04:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287784679089027 [2023-08-30 04:04:08,452 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1277 transitions. [2023-08-30 04:04:08,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1277 transitions. [2023-08-30 04:04:08,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:08,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1277 transitions. [2023-08-30 04:04:08,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.42857142857142) internal successors, (1277), 7 states have internal predecessors, (1277), 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) [2023-08-30 04:04:08,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 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) [2023-08-30 04:04:08,459 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 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) [2023-08-30 04:04:08,459 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 198 flow. Second operand 7 states and 1277 transitions. [2023-08-30 04:04:08,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 175 transitions, 724 flow [2023-08-30 04:04:21,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 175 transitions, 720 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:04:21,572 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 232 flow [2023-08-30 04:04:21,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-30 04:04:21,572 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-08-30 04:04:21,573 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 232 flow [2023-08-30 04:04:21,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 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) [2023-08-30 04:04:21,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:21,574 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:04:21,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:04:21,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 04:04:21,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:21,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1045936721, now seen corresponding path program 1 times [2023-08-30 04:04:21,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:21,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991179114] [2023-08-30 04:04:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:21,796 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:21,809 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:21,809 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:21,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:21,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:04:21,811 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:04:21,812 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:21,812 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:04:21,830 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:04:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:21,941 INFO L130 PetriNetUnfolder]: 140/1015 cut-off events. [2023-08-30 04:04:21,941 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:04:21,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1015 events. 140/1015 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5038 event pairs, 23 based on Foata normal form. 0/777 useless extension candidates. Maximal degree in co-relation 664. Up to 80 conditions per place. [2023-08-30 04:04:21,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:21,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:21,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:21,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:21,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:21,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 236 transitions, 532 flow [2023-08-30 04:04:22,065 INFO L130 PetriNetUnfolder]: 140/1015 cut-off events. [2023-08-30 04:04:22,065 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:04:22,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1015 events. 140/1015 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5038 event pairs, 23 based on Foata normal form. 0/777 useless extension candidates. Maximal degree in co-relation 664. Up to 80 conditions per place. [2023-08-30 04:04:22,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-08-30 04:04:24,917 INFO L134 LiptonReduction]: Checked pairs total: 96934 [2023-08-30 04:04:24,917 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 04:04:24,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:24,919 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1ff36449, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:24,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:24,920 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:04:24,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:24,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:24,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:24,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:24,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash 59484, now seen corresponding path program 1 times [2023-08-30 04:04:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:24,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427973236] [2023-08-30 04:04:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:24,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:24,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427973236] [2023-08-30 04:04:24,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427973236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:24,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:24,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611216961] [2023-08-30 04:04:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:25,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 393 [2023-08-30 04:04:25,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-08-30 04:04:25,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:25,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 393 [2023-08-30 04:04:25,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand