./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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_09-ptrmunge_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.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 7b88fee59ad03447f68c116aa52c40e006cc633d8116aa4d446048afd18fa64f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:38:54,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:38:54,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:38:54,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:38:54,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:38:54,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:38:54,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:38:54,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:38:54,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:38:54,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:38:54,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:38:54,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:38:54,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:38:54,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:38:54,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:38:54,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:38:54,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:38:54,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:38:54,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:38:54,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:38:54,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:38:54,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:38:54,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:38:54,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:38:54,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:38:54,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:38:54,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:38:54,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:38:54,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:38:54,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:38:54,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:38:54,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:38:54,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:38:54,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:38:54,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:38:54,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:38:54,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:38:54,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:38:54,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:38:54,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:38:54,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:38:54,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:38:54,684 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:38:54,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:38:54,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:38:54,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:38:54,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:38:54,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:38:54,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:38:54,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:38:54,687 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:38:54,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:38:54,688 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:38:54,688 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:38:54,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:38:54,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:38:54,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:38:54,689 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:38:54,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:38:54,690 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:38:54,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:38:54,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:38:54,690 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:38:54,690 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:38:54,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:38:54,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:38:54,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:38:54,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:38:54,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:38:54,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:38:54,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:38:54,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:38:54,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:38:54,693 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:38:54,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:38:54,693 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:38:54,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b88fee59ad03447f68c116aa52c40e006cc633d8116aa4d446048afd18fa64f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:38:55,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:38:55,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:38:55,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:38:55,032 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:38:55,033 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:38:55,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-29 21:38:56,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:38:56,515 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:38:56,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-29 21:38:56,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5e085b8d/ca85039620c74fadba3b01e7b74e431b/FLAG353ab1536 [2023-08-29 21:38:56,551 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5e085b8d/ca85039620c74fadba3b01e7b74e431b [2023-08-29 21:38:56,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:38:56,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:38:56,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:38:56,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:38:56,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:38:56,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:38:56" (1/1) ... [2023-08-29 21:38:56,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0e9b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:56, skipping insertion in model container [2023-08-29 21:38:56,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:38:56" (1/1) ... [2023-08-29 21:38:56,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:38:56,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:38:56,953 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_09-ptrmunge_racing.i[30176,30189] [2023-08-29 21:38:56,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:38:56,998 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:38:57,039 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_09-ptrmunge_racing.i[30176,30189] [2023-08-29 21:38:57,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:38:57,105 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:38:57,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57 WrapperNode [2023-08-29 21:38:57,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:38:57,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:38:57,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:38:57,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:38:57,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,184 INFO L138 Inliner]: procedures = 172, calls = 50, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 218 [2023-08-29 21:38:57,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:38:57,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:38:57,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:38:57,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:38:57,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,237 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:38:57,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:38:57,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:38:57,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:38:57,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (1/1) ... [2023-08-29 21:38:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:38:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:57,282 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) [2023-08-29 21:38:57,309 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 [2023-08-29 21:38:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:38:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-29 21:38:57,328 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-29 21:38:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:38:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:38:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:38:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:38:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-29 21:38:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-29 21:38:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:38:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:38:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:38:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:38:57,334 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:38:57,497 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:38:57,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:38:57,862 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:38:57,871 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:38:57,876 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-29 21:38:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:38:57 BoogieIcfgContainer [2023-08-29 21:38:57,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:38:57,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:38:57,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:38:57,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:38:57,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:38:56" (1/3) ... [2023-08-29 21:38:57,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba3e769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:38:57, skipping insertion in model container [2023-08-29 21:38:57,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:38:57" (2/3) ... [2023-08-29 21:38:57,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba3e769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:38:57, skipping insertion in model container [2023-08-29 21:38:57,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:38:57" (3/3) ... [2023-08-29 21:38:57,894 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2023-08-29 21:38:57,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:38:57,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-08-29 21:38:57,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:38:58,076 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:38:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,242 INFO L130 PetriNetUnfolder]: 58/451 cut-off events. [2023-08-29 21:38:58,243 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:38:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 451 events. 58/451 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2216 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:38:58,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,269 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:58,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:38:58,341 INFO L130 PetriNetUnfolder]: 58/451 cut-off events. [2023-08-29 21:38:58,341 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:38:58,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 451 events. 58/451 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2216 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:38:58,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 26128 [2023-08-29 21:39:03,397 INFO L134 LiptonReduction]: Checked pairs total: 65338 [2023-08-29 21:39:03,398 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-29 21:39:03,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:39:03,417 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;@67f4ce69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:03,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-08-29 21:39:03,419 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:39:03,419 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:39:03,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:03,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:03,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:03,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash 31695, now seen corresponding path program 1 times [2023-08-29 21:39:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408234362] [2023-08-29 21:39:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:03,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408234362] [2023-08-29 21:39:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408234362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:03,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:03,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589234559] [2023-08-29 21:39:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:03,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:03,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 446 [2023-08-29 21:39:03,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 109 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-29 21:39:03,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:03,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 446 [2023-08-29 21:39:03,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:05,820 INFO L130 PetriNetUnfolder]: 12861/21606 cut-off events. [2023-08-29 21:39:05,820 INFO L131 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2023-08-29 21:39:05,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41193 conditions, 21606 events. 12861/21606 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 180669 event pairs, 9752 based on Foata normal form. 1969/13751 useless extension candidates. Maximal degree in co-relation 39531. Up to 15528 conditions per place. [2023-08-29 21:39:05,972 INFO L137 encePairwiseOnDemand]: 420/446 looper letters, 103 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-29 21:39:05,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 480 flow [2023-08-29 21:39:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:39:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:39:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2023-08-29 21:39:05,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570254110612855 [2023-08-29 21:39:05,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2023-08-29 21:39:05,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2023-08-29 21:39:05,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:05,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2023-08-29 21:39:05,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2023-08-29 21:39:06,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 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) [2023-08-29 21:39:06,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 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) [2023-08-29 21:39:06,007 INFO L175 Difference]: Start difference. First operand has 88 places, 109 transitions, 240 flow. Second operand 3 states and 763 transitions. [2023-08-29 21:39:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 480 flow [2023-08-29 21:39:06,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:39:06,016 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 196 flow [2023-08-29 21:39:06,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-08-29 21:39:06,021 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2023-08-29 21:39:06,021 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 196 flow [2023-08-29 21:39:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-29 21:39:06,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:06,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:06,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:39:06,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:06,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash 31696, now seen corresponding path program 1 times [2023-08-29 21:39:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123980871] [2023-08-29 21:39:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123980871] [2023-08-29 21:39:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123980871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:06,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349310286] [2023-08-29 21:39:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:06,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:06,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 446 [2023-08-29 21:39:06,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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) [2023-08-29 21:39:06,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:06,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 446 [2023-08-29 21:39:06,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:07,722 INFO L130 PetriNetUnfolder]: 12820/21608 cut-off events. [2023-08-29 21:39:07,723 INFO L131 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2023-08-29 21:39:07,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41449 conditions, 21608 events. 12820/21608 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 179158 event pairs, 11168 based on Foata normal form. 0/12266 useless extension candidates. Maximal degree in co-relation 40228. Up to 19195 conditions per place. [2023-08-29 21:39:07,859 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 84 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-29 21:39:07,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 408 flow [2023-08-29 21:39:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:39:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:39:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-08-29 21:39:07,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321375186846039 [2023-08-29 21:39:07,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-08-29 21:39:07,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-08-29 21:39:07,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:07,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-08-29 21:39:07,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 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) [2023-08-29 21:39:07,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 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) [2023-08-29 21:39:07,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 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) [2023-08-29 21:39:07,869 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 196 flow. Second operand 3 states and 712 transitions. [2023-08-29 21:39:07,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 408 flow [2023-08-29 21:39:07,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:39:07,881 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 202 flow [2023-08-29 21:39:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2023-08-29 21:39:07,882 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2023-08-29 21:39:07,882 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 202 flow [2023-08-29 21:39:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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) [2023-08-29 21:39:07,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:07,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:39:07,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:39:07,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:07,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 944955220, now seen corresponding path program 1 times [2023-08-29 21:39:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091360815] [2023-08-29 21:39:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091360815] [2023-08-29 21:39:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091360815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:07,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692712083] [2023-08-29 21:39:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:07,987 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) [2023-08-29 21:39:07,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:39:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:39:08,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:08,134 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 [2023-08-29 21:39:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:08,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692712083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:08,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:39:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618439599] [2023-08-29 21:39:08,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:39:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:39:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:39:08,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 446 [2023-08-29 21:39:08,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 204.875) internal successors, (1639), 8 states have internal predecessors, (1639), 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) [2023-08-29 21:39:08,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:08,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 446 [2023-08-29 21:39:08,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:08,708 INFO L130 PetriNetUnfolder]: 41/126 cut-off events. [2023-08-29 21:39:08,708 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-29 21:39:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 126 events. 41/126 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 474 event pairs, 16 based on Foata normal form. 20/113 useless extension candidates. Maximal degree in co-relation 276. Up to 78 conditions per place. [2023-08-29 21:39:08,710 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 31 selfloop transitions, 2 changer transitions 11/53 dead transitions. [2023-08-29 21:39:08,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 203 flow [2023-08-29 21:39:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-08-29 21:39:08,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48038116591928254 [2023-08-29 21:39:08,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-08-29 21:39:08,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-08-29 21:39:08,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:08,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-08-29 21:39:08,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 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) [2023-08-29 21:39:08,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:08,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:08,790 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 202 flow. Second operand 4 states and 857 transitions. [2023-08-29 21:39:08,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 203 flow [2023-08-29 21:39:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 197 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:39:08,792 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 63 flow [2023-08-29 21:39:08,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-29 21:39:08,794 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -49 predicate places. [2023-08-29 21:39:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 63 flow [2023-08-29 21:39:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 204.875) internal successors, (1639), 8 states have internal predecessors, (1639), 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) [2023-08-29 21:39:08,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:08,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:08,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:39:08,995 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 [2023-08-29 21:39:08,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:08,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1864522110, now seen corresponding path program 1 times [2023-08-29 21:39:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:08,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003614543] [2023-08-29 21:39:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003614543] [2023-08-29 21:39:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003614543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:39:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296223991] [2023-08-29 21:39:09,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:09,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:39:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:39:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:39:09,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 446 [2023-08-29 21:39:09,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 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) [2023-08-29 21:39:09,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:09,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 446 [2023-08-29 21:39:09,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:09,353 INFO L130 PetriNetUnfolder]: 26/112 cut-off events. [2023-08-29 21:39:09,354 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 21:39:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 112 events. 26/112 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 462 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 217. Up to 32 conditions per place. [2023-08-29 21:39:09,354 INFO L137 encePairwiseOnDemand]: 441/446 looper letters, 25 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-29 21:39:09,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 151 flow [2023-08-29 21:39:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-08-29 21:39:09,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46580717488789236 [2023-08-29 21:39:09,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-08-29 21:39:09,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-08-29 21:39:09,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:09,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-08-29 21:39:09,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 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) [2023-08-29 21:39:09,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:09,364 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:09,364 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 63 flow. Second operand 4 states and 831 transitions. [2023-08-29 21:39:09,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 151 flow [2023-08-29 21:39:09,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:39:09,366 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 81 flow [2023-08-29 21:39:09,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-29 21:39:09,368 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -52 predicate places. [2023-08-29 21:39:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 81 flow [2023-08-29 21:39:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 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) [2023-08-29 21:39:09,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:09,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:09,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:39:09,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:09,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1864521955, now seen corresponding path program 1 times [2023-08-29 21:39:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:09,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699607165] [2023-08-29 21:39:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:09,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699607165] [2023-08-29 21:39:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699607165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:09,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:09,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:39:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835292623] [2023-08-29 21:39:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:39:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:39:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:39:09,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 446 [2023-08-29 21:39:09,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 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) [2023-08-29 21:39:09,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:09,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 446 [2023-08-29 21:39:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:09,750 INFO L130 PetriNetUnfolder]: 20/87 cut-off events. [2023-08-29 21:39:09,751 INFO L131 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2023-08-29 21:39:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 87 events. 20/87 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 310 event pairs, 5 based on Foata normal form. 7/81 useless extension candidates. Maximal degree in co-relation 199. Up to 57 conditions per place. [2023-08-29 21:39:09,751 INFO L137 encePairwiseOnDemand]: 439/446 looper letters, 17 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-29 21:39:09,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 116 flow [2023-08-29 21:39:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 830 transitions. [2023-08-29 21:39:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524663677130046 [2023-08-29 21:39:09,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 830 transitions. [2023-08-29 21:39:09,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 830 transitions. [2023-08-29 21:39:09,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:09,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 830 transitions. [2023-08-29 21:39:09,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 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) [2023-08-29 21:39:09,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:09,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:09,764 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 81 flow. Second operand 4 states and 830 transitions. [2023-08-29 21:39:09,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 116 flow [2023-08-29 21:39:09,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:39:09,766 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 72 flow [2023-08-29 21:39:09,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-29 21:39:09,769 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -55 predicate places. [2023-08-29 21:39:09,769 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 72 flow [2023-08-29 21:39:09,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 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) [2023-08-29 21:39:09,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:09,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:39:09,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:09,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1864521954, now seen corresponding path program 1 times [2023-08-29 21:39:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:09,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831294091] [2023-08-29 21:39:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831294091] [2023-08-29 21:39:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831294091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:39:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917418625] [2023-08-29 21:39:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:39:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:39:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:39:10,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 446 [2023-08-29 21:39:10,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 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) [2023-08-29 21:39:10,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:10,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 446 [2023-08-29 21:39:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:10,082 INFO L130 PetriNetUnfolder]: 16/64 cut-off events. [2023-08-29 21:39:10,082 INFO L131 PetriNetUnfolder]: For 19/20 co-relation queries the response was YES. [2023-08-29 21:39:10,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 64 events. 16/64 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 177 event pairs, 3 based on Foata normal form. 10/69 useless extension candidates. Maximal degree in co-relation 156. Up to 45 conditions per place. [2023-08-29 21:39:10,083 INFO L137 encePairwiseOnDemand]: 439/446 looper letters, 7 selfloop transitions, 2 changer transitions 10/21 dead transitions. [2023-08-29 21:39:10,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 103 flow [2023-08-29 21:39:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-08-29 21:39:10,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44170403587443946 [2023-08-29 21:39:10,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-08-29 21:39:10,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-08-29 21:39:10,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:10,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-08-29 21:39:10,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-08-29 21:39:10,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:10,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:10,095 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 72 flow. Second operand 4 states and 788 transitions. [2023-08-29 21:39:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 103 flow [2023-08-29 21:39:10,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:39:10,096 INFO L231 Difference]: Finished difference. Result has 29 places, 10 transitions, 42 flow [2023-08-29 21:39:10,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=29, PETRI_TRANSITIONS=10} [2023-08-29 21:39:10,099 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -59 predicate places. [2023-08-29 21:39:10,099 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 10 transitions, 42 flow [2023-08-29 21:39:10,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 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) [2023-08-29 21:39:10,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:10,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:10,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:39:10,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:39:10,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 241883853, now seen corresponding path program 1 times [2023-08-29 21:39:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:10,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136290525] [2023-08-29 21:39:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136290525] [2023-08-29 21:39:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136290525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181070518] [2023-08-29 21:39:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:10,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:10,276 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) [2023-08-29 21:39:10,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:39:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 21:39:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:10,392 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:39:10,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:39:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 21:39:10,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 21:39:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181070518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:10,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-29 21:39:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538665705] [2023-08-29 21:39:10,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 21:39:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 21:39:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=55, Unknown=7, NotChecked=0, Total=90 [2023-08-29 21:39:11,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 446 [2023-08-29 21:39:11,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 10 transitions, 42 flow. Second operand has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 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) [2023-08-29 21:39:11,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:11,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 446 [2023-08-29 21:39:11,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:11,037 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2023-08-29 21:39:11,037 INFO L131 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2023-08-29 21:39:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 22 events. 3/22 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 63. Up to 11 conditions per place. [2023-08-29 21:39:11,038 INFO L137 encePairwiseOnDemand]: 443/446 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-29 21:39:11,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 10 transitions, 57 flow [2023-08-29 21:39:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-29 21:39:11,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359304932735426 [2023-08-29 21:39:11,040 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-29 21:39:11,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-29 21:39:11,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:11,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-29 21:39:11,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 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) [2023-08-29 21:39:11,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:11,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 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) [2023-08-29 21:39:11,045 INFO L175 Difference]: Start difference. First operand has 29 places, 10 transitions, 42 flow. Second operand 4 states and 641 transitions. [2023-08-29 21:39:11,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 10 transitions, 57 flow [2023-08-29 21:39:11,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 51 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:39:11,046 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-29 21:39:11,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-29 21:39:11,046 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -68 predicate places. [2023-08-29 21:39:11,046 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-29 21:39:11,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 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) [2023-08-29 21:39:11,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 53 remaining) [2023-08-29 21:39:11,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (51 of 53 remaining) [2023-08-29 21:39:11,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 53 remaining) [2023-08-29 21:39:11,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (49 of 53 remaining) [2023-08-29 21:39:11,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 53 remaining) [2023-08-29 21:39:11,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 53 remaining) [2023-08-29 21:39:11,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 53 remaining) [2023-08-29 21:39:11,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 53 remaining) [2023-08-29 21:39:11,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 53 remaining) [2023-08-29 21:39:11,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 53 remaining) [2023-08-29 21:39:11,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 53 remaining) [2023-08-29 21:39:11,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 53 remaining) [2023-08-29 21:39:11,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 53 remaining) [2023-08-29 21:39:11,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 53 remaining) [2023-08-29 21:39:11,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (33 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 53 remaining) [2023-08-29 21:39:11,054 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 53 remaining) [2023-08-29 21:39:11,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 53 remaining) [2023-08-29 21:39:11,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 53 remaining) [2023-08-29 21:39:11,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 53 remaining) [2023-08-29 21:39:11,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 53 remaining) [2023-08-29 21:39:11,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 53 remaining) [2023-08-29 21:39:11,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 53 remaining) [2023-08-29 21:39:11,057 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 53 remaining) [2023-08-29 21:39:11,057 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 53 remaining) [2023-08-29 21:39:11,057 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 53 remaining) [2023-08-29 21:39:11,057 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 53 remaining) [2023-08-29 21:39:11,057 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (6 of 53 remaining) [2023-08-29 21:39:11,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 53 remaining) [2023-08-29 21:39:11,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 53 remaining) [2023-08-29 21:39:11,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 53 remaining) [2023-08-29 21:39:11,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 53 remaining) [2023-08-29 21:39:11,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 53 remaining) [2023-08-29 21:39:11,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 53 remaining) [2023-08-29 21:39:11,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:39:11,264 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 [2023-08-29 21:39:11,265 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:11,266 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:39:11,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,310 INFO L130 PetriNetUnfolder]: 58/451 cut-off events. [2023-08-29 21:39:11,311 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:39:11,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 451 events. 58/451 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2216 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:39:11,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,317 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:11,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 247 transitions, 516 flow [2023-08-29 21:39:11,349 INFO L130 PetriNetUnfolder]: 58/451 cut-off events. [2023-08-29 21:39:11,349 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:39:11,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 451 events. 58/451 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2216 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:39:11,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 26128 [2023-08-29 21:39:15,858 INFO L134 LiptonReduction]: Checked pairs total: 65559 [2023-08-29 21:39:15,858 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-29 21:39:15,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:39:15,864 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;@67f4ce69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:15,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 21:39:15,869 INFO L130 PetriNetUnfolder]: 1/31 cut-off events. [2023-08-29 21:39:15,869 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:39:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:39:15,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:39:15,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 851992481, now seen corresponding path program 1 times [2023-08-29 21:39:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309904684] [2023-08-29 21:39:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:15,882 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:39:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:15,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:39:15,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:39:15,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 21:39:15,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 21:39:15,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:39:15,904 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:39:15,905 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 21:39:15,906 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:39:15,906 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:39:15,951 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-29 21:39:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,133 INFO L130 PetriNetUnfolder]: 197/1320 cut-off events. [2023-08-29 21:39:16,134 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-29 21:39:16,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 1320 events. 197/1320 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8775 event pairs, 1 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 794. Up to 32 conditions per place. [2023-08-29 21:39:16,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:16,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 395 transitions, 838 flow [2023-08-29 21:39:16,357 INFO L130 PetriNetUnfolder]: 197/1320 cut-off events. [2023-08-29 21:39:16,357 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-29 21:39:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 1320 events. 197/1320 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8775 event pairs, 1 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 794. Up to 32 conditions per place. [2023-08-29 21:39:16,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 95424 [2023-08-29 21:39:21,983 INFO L134 LiptonReduction]: Checked pairs total: 271950 [2023-08-29 21:39:21,983 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-29 21:39:21,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:39:21,985 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;@67f4ce69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:21,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-08-29 21:39:21,987 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:39:21,987 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:39:21,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:21,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:21,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-08-29 21:39:21,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 65039, now seen corresponding path program 1 times [2023-08-29 21:39:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627231274] [2023-08-29 21:39:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627231274] [2023-08-29 21:39:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627231274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:22,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:22,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421094296] [2023-08-29 21:39:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:22,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 697 [2023-08-29 21:39:22,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 195 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2023-08-29 21:39:22,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:22,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 697 [2023-08-29 21:39:22,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand