./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:16:57,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:16:57,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:16:57,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:16:57,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:16:57,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:16:57,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:16:57,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:16:57,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:16:57,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:16:57,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:16:57,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:16:57,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:16:57,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:16:57,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:16:57,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:16:57,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:16:57,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:16:57,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:16:57,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:16:57,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:16:57,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:16:57,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:16:57,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:16:57,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:16:57,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:16:57,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:16:57,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:16:57,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:16:57,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:16:57,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:16:57,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:16:57,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:16:57,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:16:57,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:16:57,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:16:57,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:16:57,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:16:57,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:16:57,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:16:57,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:16:57,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:16:57,225 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:16:57,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:16:57,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:16:57,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:16:57,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:16:57,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:16:57,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:16:57,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:16:57,227 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:16:57,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:16:57,228 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:16:57,228 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:16:57,229 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:16:57,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:16:57,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:57,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:16:57,231 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:16:57,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:16:57,232 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:16:57,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:16:57,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:16:57,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:16:57,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:16:57,511 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:16:57,511 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:16:57,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-30 04:16:58,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:16:58,735 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:16:58,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-30 04:16:58,745 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440ab13af/2899dcb1c1264f4f92eff4c9c968d232/FLAG71fcc7c20 [2023-08-30 04:16:58,759 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440ab13af/2899dcb1c1264f4f92eff4c9c968d232 [2023-08-30 04:16:58,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:16:58,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:16:58,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:58,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:16:58,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:16:58,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:58" (1/1) ... [2023-08-30 04:16:58,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134d18d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:58, skipping insertion in model container [2023-08-30 04:16:58,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:58" (1/1) ... [2023-08-30 04:16:58,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:16:58,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:16:59,089 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_75-tricky_address2_racefree.i[41323,41336] [2023-08-30 04:16:59,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:59,138 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:16:59,159 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_75-tricky_address2_racefree.i[41323,41336] [2023-08-30 04:16:59,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:59,270 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:16:59,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59 WrapperNode [2023-08-30 04:16:59,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:59,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:59,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:16:59,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:16:59,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,331 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-08-30 04:16:59,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:59,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:16:59,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:16:59,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:16:59,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:16:59,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:16:59,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:16:59,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:16:59,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (1/1) ... [2023-08-30 04:16:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:59,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:16:59,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:16:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:16:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:16:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:16:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:16:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:16:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:16:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:16:59,417 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:16:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:16:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:16:59,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:16:59,418 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:16:59,520 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:16:59,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:16:59,870 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:16:59,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:16:59,878 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-30 04:16:59,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:59 BoogieIcfgContainer [2023-08-30 04:16:59,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:16:59,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:16:59,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:16:59,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:16:59,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:16:58" (1/3) ... [2023-08-30 04:16:59,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2c63fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:59, skipping insertion in model container [2023-08-30 04:16:59,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:59" (2/3) ... [2023-08-30 04:16:59,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2c63fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:59, skipping insertion in model container [2023-08-30 04:16:59,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:59" (3/3) ... [2023-08-30 04:16:59,887 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-08-30 04:16:59,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:16:59,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-30 04:16:59,899 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:16:59,979 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:17:00,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,099 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-08-30 04:17:00,099 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 04:17:00,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1160 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-30 04:17:00,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,116 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:17:00,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:17:00,161 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-08-30 04:17:00,161 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 04:17:00,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1160 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-30 04:17:00,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 14508 [2023-08-30 04:17:03,305 INFO L134 LiptonReduction]: Checked pairs total: 29354 [2023-08-30 04:17:03,305 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-08-30 04:17:03,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:03,319 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;@2a917d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:03,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 04:17:03,322 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:17:03,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:03,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:03,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:03,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:03,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 862756, now seen corresponding path program 1 times [2023-08-30 04:17:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961539629] [2023-08-30 04:17:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961539629] [2023-08-30 04:17:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961539629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:03,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139444271] [2023-08-30 04:17:03,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 419 [2023-08-30 04:17:03,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:03,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 419 [2023-08-30 04:17:03,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:03,769 INFO L130 PetriNetUnfolder]: 621/1407 cut-off events. [2023-08-30 04:17:03,770 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:17:03,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 1407 events. 621/1407 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9184 event pairs, 570 based on Foata normal form. 104/1008 useless extension candidates. Maximal degree in co-relation 2555. Up to 1225 conditions per place. [2023-08-30 04:17:03,777 INFO L137 encePairwiseOnDemand]: 389/419 looper letters, 54 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 04:17:03,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 254 flow [2023-08-30 04:17:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 04:17:03,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035799522673031 [2023-08-30 04:17:03,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:03,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,808 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 633 transitions. [2023-08-30 04:17:03,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 254 flow [2023-08-30 04:17:03,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:03,813 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2023-08-30 04:17:03,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 04:17:03,816 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 04:17:03,817 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2023-08-30 04:17:03,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:03,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:17:03,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:17:03,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:03,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 26729995, now seen corresponding path program 1 times [2023-08-30 04:17:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614794003] [2023-08-30 04:17:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614794003] [2023-08-30 04:17:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614794003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:03,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153957269] [2023-08-30 04:17:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:03,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:03,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:03,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:17:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:17:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:03,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153957269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:03,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:03,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:03,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586065152] [2023-08-30 04:17:03,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:03,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:04,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:04,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:04,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:04,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:04,206 INFO L130 PetriNetUnfolder]: 621/1410 cut-off events. [2023-08-30 04:17:04,206 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:17:04,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 1410 events. 621/1410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9196 event pairs, 570 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 2644. Up to 1225 conditions per place. [2023-08-30 04:17:04,211 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 54 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-30 04:17:04,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 282 flow [2023-08-30 04:17:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1154 transitions. [2023-08-30 04:17:04,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590294351630867 [2023-08-30 04:17:04,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1154 transitions. [2023-08-30 04:17:04,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1154 transitions. [2023-08-30 04:17:04,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:04,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1154 transitions. [2023-08-30 04:17:04,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,220 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,220 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1154 transitions. [2023-08-30 04:17:04,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 282 flow [2023-08-30 04:17:04,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:04,223 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2023-08-30 04:17:04,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-08-30 04:17:04,223 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-30 04:17:04,224 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2023-08-30 04:17:04,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:04,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:04,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:04,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:04,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:04,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1728936806, now seen corresponding path program 2 times [2023-08-30 04:17:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:04,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881880856] [2023-08-30 04:17:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881880856] [2023-08-30 04:17:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881880856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:04,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:04,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550589173] [2023-08-30 04:17:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:04,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:04,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 419 [2023-08-30 04:17:04,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:04,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 419 [2023-08-30 04:17:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:04,704 INFO L130 PetriNetUnfolder]: 579/1314 cut-off events. [2023-08-30 04:17:04,704 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:17:04,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1314 events. 579/1314 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8505 event pairs, 494 based on Foata normal form. 0/867 useless extension candidates. Maximal degree in co-relation 2459. Up to 1062 conditions per place. [2023-08-30 04:17:04,709 INFO L137 encePairwiseOnDemand]: 414/419 looper letters, 73 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-30 04:17:04,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 370 flow [2023-08-30 04:17:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-30 04:17:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48607796340493237 [2023-08-30 04:17:04,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:04,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,715 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 611 transitions. [2023-08-30 04:17:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 370 flow [2023-08-30 04:17:04,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 356 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:04,717 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 172 flow [2023-08-30 04:17:04,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-30 04:17:04,718 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-30 04:17:04,718 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 172 flow [2023-08-30 04:17:04,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:04,718 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:17:04,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:04,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1728936804, now seen corresponding path program 1 times [2023-08-30 04:17:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372587935] [2023-08-30 04:17:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:04,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372587935] [2023-08-30 04:17:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372587935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110610211] [2023-08-30 04:17:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:04,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:04,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:17:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:17:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:05,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110610211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:05,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:05,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:17:05,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731820274] [2023-08-30 04:17:05,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:17:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:17:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:17:05,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:05,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:05,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:05,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:05,260 INFO L130 PetriNetUnfolder]: 581/1326 cut-off events. [2023-08-30 04:17:05,260 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 04:17:05,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1326 events. 581/1326 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8510 event pairs, 532 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 2508. Up to 1145 conditions per place. [2023-08-30 04:17:05,266 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 52 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-30 04:17:05,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 334 flow [2023-08-30 04:17:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:17:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:17:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2253 transitions. [2023-08-30 04:17:05,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448090692124105 [2023-08-30 04:17:05,271 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:05,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.75) internal successors, (2253), 12 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,286 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,286 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 172 flow. Second operand 12 states and 2253 transitions. [2023-08-30 04:17:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 334 flow [2023-08-30 04:17:05,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:05,292 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 250 flow [2023-08-30 04:17:05,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-30 04:17:05,295 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-08-30 04:17:05,295 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 250 flow [2023-08-30 04:17:05,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:05,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:17:05,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:05,502 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,SelfDestructingSolverStorable3 [2023-08-30 04:17:05,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:05,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 316868932, now seen corresponding path program 2 times [2023-08-30 04:17:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482820939] [2023-08-30 04:17:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:05,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482820939] [2023-08-30 04:17:05,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482820939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:05,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:05,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638956284] [2023-08-30 04:17:05,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:05,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:05,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:05,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:05,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:05,816 INFO L130 PetriNetUnfolder]: 554/1219 cut-off events. [2023-08-30 04:17:05,816 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 04:17:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1219 events. 554/1219 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8104 event pairs, 0 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2360. Up to 1111 conditions per place. [2023-08-30 04:17:05,823 INFO L137 encePairwiseOnDemand]: 415/419 looper letters, 81 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:17:05,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 456 flow [2023-08-30 04:17:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-30 04:17:05,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49403341288782815 [2023-08-30 04:17:05,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:05,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,830 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 250 flow. Second operand 3 states and 621 transitions. [2023-08-30 04:17:05,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 456 flow [2023-08-30 04:17:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 408 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:17:05,833 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 212 flow [2023-08-30 04:17:05,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-08-30 04:17:05,834 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-30 04:17:05,834 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 212 flow [2023-08-30 04:17:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:17:05,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:05,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -495094452, now seen corresponding path program 1 times [2023-08-30 04:17:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059180863] [2023-08-30 04:17:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059180863] [2023-08-30 04:17:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059180863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698519198] [2023-08-30 04:17:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:05,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:05,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:05,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:17:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:06,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:17:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698519198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:06,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:06,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:17:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656109465] [2023-08-30 04:17:06,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:06,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:17:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:17:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:17:06,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 419 [2023-08-30 04:17:06,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:06,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 419 [2023-08-30 04:17:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:06,406 INFO L130 PetriNetUnfolder]: 42/134 cut-off events. [2023-08-30 04:17:06,406 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 04:17:06,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 134 events. 42/134 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 444 event pairs, 15 based on Foata normal form. 20/133 useless extension candidates. Maximal degree in co-relation 280. Up to 78 conditions per place. [2023-08-30 04:17:06,406 INFO L137 encePairwiseOnDemand]: 415/419 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-30 04:17:06,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 293 flow [2023-08-30 04:17:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:17:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:17:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-08-30 04:17:06,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528639618138425 [2023-08-30 04:17:06,408 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:06,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,412 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 212 flow. Second operand 4 states and 759 transitions. [2023-08-30 04:17:06,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 293 flow [2023-08-30 04:17:06,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:17:06,413 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 141 flow [2023-08-30 04:17:06,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-30 04:17:06,414 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-08-30 04:17:06,414 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 141 flow [2023-08-30 04:17:06,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:06,414 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:06,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 04:17:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:06,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:06,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1831967456, now seen corresponding path program 1 times [2023-08-30 04:17:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542571680] [2023-08-30 04:17:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542571680] [2023-08-30 04:17:06,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542571680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:06,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:17:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087143479] [2023-08-30 04:17:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:17:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:17:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:17:06,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 419 [2023-08-30 04:17:06,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:06,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 419 [2023-08-30 04:17:06,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:06,937 INFO L130 PetriNetUnfolder]: 34/102 cut-off events. [2023-08-30 04:17:06,937 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 04:17:06,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 102 events. 34/102 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 3/99 useless extension candidates. Maximal degree in co-relation 200. Up to 75 conditions per place. [2023-08-30 04:17:06,938 INFO L137 encePairwiseOnDemand]: 409/419 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:17:06,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 37 transitions, 197 flow [2023-08-30 04:17:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:17:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:17:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2023-08-30 04:17:06,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075178997613365 [2023-08-30 04:17:06,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2023-08-30 04:17:06,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2023-08-30 04:17:06,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:06,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2023-08-30 04:17:06,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,943 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 141 flow. Second operand 4 states and 683 transitions. [2023-08-30 04:17:06,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 37 transitions, 197 flow [2023-08-30 04:17:06,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:06,944 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 126 flow [2023-08-30 04:17:06,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-30 04:17:06,944 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -20 predicate places. [2023-08-30 04:17:06,945 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 126 flow [2023-08-30 04:17:06,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:06,945 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:17:06,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:17:06,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:06,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1831941840, now seen corresponding path program 1 times [2023-08-30 04:17:06,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:06,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622602071] [2023-08-30 04:17:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:06,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:06,961 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:17:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:06,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:17:06,981 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:17:06,981 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-08-30 04:17:06,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (31 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-30 04:17:06,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-08-30 04:17:06,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-30 04:17:06,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-08-30 04:17:06,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:17:06,985 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-30 04:17:06,987 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:17:06,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:17:07,011 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:17:07,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,046 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-08-30 04:17:07,047 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 04:17:07,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-08-30 04:17:07,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,054 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:17:07,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,055 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,090 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-08-30 04:17:07,091 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 04:17:07,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-08-30 04:17:07,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 42900 [2023-08-30 04:17:10,695 INFO L134 LiptonReduction]: Checked pairs total: 81765 [2023-08-30 04:17:10,695 INFO L136 LiptonReduction]: Total number of compositions: 272 [2023-08-30 04:17:10,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:10,697 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;@2a917d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:10,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:17:10,698 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:17:10,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:10,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:10,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1507360, now seen corresponding path program 1 times [2023-08-30 04:17:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:10,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417520700] [2023-08-30 04:17:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:10,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:10,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417520700] [2023-08-30 04:17:10,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417520700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:10,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395999103] [2023-08-30 04:17:10,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:10,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:10,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:10,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 570 [2023-08-30 04:17:10,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:10,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 570 [2023-08-30 04:17:10,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:13,505 INFO L130 PetriNetUnfolder]: 28201/45446 cut-off events. [2023-08-30 04:17:13,505 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 04:17:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87035 conditions, 45446 events. 28201/45446 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 375948 event pairs, 26736 based on Foata normal form. 3624/32258 useless extension candidates. Maximal degree in co-relation 35374. Up to 41457 conditions per place. [2023-08-30 04:17:13,803 INFO L137 encePairwiseOnDemand]: 528/570 looper letters, 77 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-08-30 04:17:13,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 370 flow [2023-08-30 04:17:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-08-30 04:17:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046783625730994 [2023-08-30 04:17:13,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-08-30 04:17:13,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-08-30 04:17:13,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:13,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-08-30 04:17:13,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:13,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:13,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:13,810 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 863 transitions. [2023-08-30 04:17:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 370 flow [2023-08-30 04:17:13,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:13,812 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 222 flow [2023-08-30 04:17:13,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-08-30 04:17:13,814 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-30 04:17:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 222 flow [2023-08-30 04:17:13,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:13,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:13,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:17:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:17:13,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:13,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 46683970, now seen corresponding path program 1 times [2023-08-30 04:17:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117549927] [2023-08-30 04:17:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:13,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:13,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117549927] [2023-08-30 04:17:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117549927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153873484] [2023-08-30 04:17:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:13,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:13,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:17:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:17:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:13,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153873484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:13,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820782803] [2023-08-30 04:17:13,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:13,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:13,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:13,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:13,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:13,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:16,441 INFO L130 PetriNetUnfolder]: 28201/45449 cut-off events. [2023-08-30 04:17:16,441 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 04:17:16,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87051 conditions, 45449 events. 28201/45449 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 376129 event pairs, 26736 based on Foata normal form. 0/28637 useless extension candidates. Maximal degree in co-relation 87038. Up to 41457 conditions per place. [2023-08-30 04:17:16,631 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 77 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-08-30 04:17:16,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 398 flow [2023-08-30 04:17:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1567 transitions. [2023-08-30 04:17:16,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458187134502924 [2023-08-30 04:17:16,636 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1567 transitions. [2023-08-30 04:17:16,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1567 transitions. [2023-08-30 04:17:16,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:16,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1567 transitions. [2023-08-30 04:17:16,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.1666666666667) internal successors, (1567), 6 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:16,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:16,644 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 222 flow. Second operand 6 states and 1567 transitions. [2023-08-30 04:17:16,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 398 flow [2023-08-30 04:17:16,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:16,646 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 254 flow [2023-08-30 04:17:16,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-30 04:17:16,647 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-08-30 04:17:16,647 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 254 flow [2023-08-30 04:17:16,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:16,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:16,648 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:16,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 04:17:16,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:16,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:16,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -851134304, now seen corresponding path program 2 times [2023-08-30 04:17:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:16,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309613726] [2023-08-30 04:17:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:16,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:16,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309613726] [2023-08-30 04:17:16,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309613726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561351836] [2023-08-30 04:17:16,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:17:16,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:16,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:16,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:16,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:17:17,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:17:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:17:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:17:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:17,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:17:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:17,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:17:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561351836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:17,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:17:17,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:17:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211471827] [2023-08-30 04:17:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:17:17,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:17,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:17,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:17,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:17,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:19,663 INFO L130 PetriNetUnfolder]: 27810/44598 cut-off events. [2023-08-30 04:17:19,663 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 04:17:19,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86216 conditions, 44598 events. 27810/44598 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 368220 event pairs, 12936 based on Foata normal form. 0/28298 useless extension candidates. Maximal degree in co-relation 86181. Up to 41416 conditions per place. [2023-08-30 04:17:19,884 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 103 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-30 04:17:19,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 510 flow [2023-08-30 04:17:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 844 transitions. [2023-08-30 04:17:19,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935672514619883 [2023-08-30 04:17:19,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 844 transitions. [2023-08-30 04:17:19,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 844 transitions. [2023-08-30 04:17:19,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:19,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 844 transitions. [2023-08-30 04:17:19,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,892 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 254 flow. Second operand 3 states and 844 transitions. [2023-08-30 04:17:19,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 510 flow [2023-08-30 04:17:19,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 496 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:19,895 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2023-08-30 04:17:19,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-08-30 04:17:19,896 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-08-30 04:17:19,896 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2023-08-30 04:17:19,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:19,906 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:19,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:20,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 04:17:20,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:20,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash -851134303, now seen corresponding path program 1 times [2023-08-30 04:17:20,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:20,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223013714] [2023-08-30 04:17:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:20,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:20,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:20,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223013714] [2023-08-30 04:17:20,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223013714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:20,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:20,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:20,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842125052] [2023-08-30 04:17:20,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:20,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:20,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-08-30 04:17:20,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:20,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:20,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-08-30 04:17:20,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:22,635 INFO L130 PetriNetUnfolder]: 26358/41888 cut-off events. [2023-08-30 04:17:22,636 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 04:17:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82135 conditions, 41888 events. 26358/41888 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 339707 event pairs, 23069 based on Foata normal form. 0/27283 useless extension candidates. Maximal degree in co-relation 82105. Up to 35764 conditions per place. [2023-08-30 04:17:22,822 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 119 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-30 04:17:22,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 576 flow [2023-08-30 04:17:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 851 transitions. [2023-08-30 04:17:22,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976608187134503 [2023-08-30 04:17:22,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 851 transitions. [2023-08-30 04:17:22,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 851 transitions. [2023-08-30 04:17:22,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:22,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 851 transitions. [2023-08-30 04:17:22,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,828 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 3 states and 851 transitions. [2023-08-30 04:17:22,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 576 flow [2023-08-30 04:17:22,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:22,832 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 254 flow [2023-08-30 04:17:22,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-08-30 04:17:22,832 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-08-30 04:17:22,833 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 254 flow [2023-08-30 04:17:22,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:22,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:17:22,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:22,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1219344055, now seen corresponding path program 1 times [2023-08-30 04:17:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213936868] [2023-08-30 04:17:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:22,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213936868] [2023-08-30 04:17:22,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213936868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878577613] [2023-08-30 04:17:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:22,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:22,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:22,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:22,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:17:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:17:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:22,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878577613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:22,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:17:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872144396] [2023-08-30 04:17:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:17:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:17:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:17:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:23,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 248.46153846153845) internal successors, (3230), 13 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:23,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:23,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:23,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:25,868 INFO L130 PetriNetUnfolder]: 26438/42014 cut-off events. [2023-08-30 04:17:25,868 INFO L131 PetriNetUnfolder]: For 1412/1412 co-relation queries the response was YES. [2023-08-30 04:17:25,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83271 conditions, 42014 events. 26438/42014 cut-off events. For 1412/1412 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 339178 event pairs, 24913 based on Foata normal form. 6/27939 useless extension candidates. Maximal degree in co-relation 83217. Up to 38623 conditions per place. [2023-08-30 04:17:26,036 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 76 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-30 04:17:26,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 464 flow [2023-08-30 04:17:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:17:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:17:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3056 transitions. [2023-08-30 04:17:26,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-08-30 04:17:26,042 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3056 transitions. [2023-08-30 04:17:26,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3056 transitions. [2023-08-30 04:17:26,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:26,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3056 transitions. [2023-08-30 04:17:26,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 254.66666666666666) internal successors, (3056), 12 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,053 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,053 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 254 flow. Second operand 12 states and 3056 transitions. [2023-08-30 04:17:26,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 464 flow [2023-08-30 04:17:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:26,096 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 332 flow [2023-08-30 04:17:26,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-08-30 04:17:26,096 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-30 04:17:26,096 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 332 flow [2023-08-30 04:17:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 248.46153846153845) internal successors, (3230), 13 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:26,097 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:26,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 04:17:26,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:26,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:26,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:26,303 INFO L85 PathProgramCache]: Analyzing trace with hash 322307593, now seen corresponding path program 2 times [2023-08-30 04:17:26,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:26,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449135461] [2023-08-30 04:17:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:26,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449135461] [2023-08-30 04:17:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449135461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:26,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:17:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782687318] [2023-08-30 04:17:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:17:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:17:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:17:26,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 570 [2023-08-30 04:17:26,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:26,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 570 [2023-08-30 04:17:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:28,210 INFO L130 PetriNetUnfolder]: 14864/23941 cut-off events. [2023-08-30 04:17:28,211 INFO L131 PetriNetUnfolder]: For 682/682 co-relation queries the response was YES. [2023-08-30 04:17:28,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47302 conditions, 23941 events. 14864/23941 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 180820 event pairs, 3586 based on Foata normal form. 486/19170 useless extension candidates. Maximal degree in co-relation 47224. Up to 18895 conditions per place. [2023-08-30 04:17:28,479 INFO L137 encePairwiseOnDemand]: 550/570 looper letters, 177 selfloop transitions, 7 changer transitions 0/198 dead transitions. [2023-08-30 04:17:28,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 198 transitions, 902 flow [2023-08-30 04:17:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1537 transitions. [2023-08-30 04:17:28,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44941520467836255 [2023-08-30 04:17:28,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1537 transitions. [2023-08-30 04:17:28,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1537 transitions. [2023-08-30 04:17:28,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:28,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1537 transitions. [2023-08-30 04:17:28,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,493 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,494 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 332 flow. Second operand 6 states and 1537 transitions. [2023-08-30 04:17:28,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 198 transitions, 902 flow [2023-08-30 04:17:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 198 transitions, 854 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:17:28,499 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 329 flow [2023-08-30 04:17:28,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-08-30 04:17:28,500 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 14 predicate places. [2023-08-30 04:17:28,500 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 329 flow [2023-08-30 04:17:28,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:28,500 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:28,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:17:28,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:28,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 321867313, now seen corresponding path program 1 times [2023-08-30 04:17:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086663413] [2023-08-30 04:17:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086663413] [2023-08-30 04:17:28,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086663413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333417276] [2023-08-30 04:17:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:28,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:28,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:28,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:17:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:28,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:17:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:28,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:28,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333417276] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:28,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:28,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:28,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943149796] [2023-08-30 04:17:28,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:28,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:28,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-08-30 04:17:29,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:29,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-08-30 04:17:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:30,543 INFO L130 PetriNetUnfolder]: 12979/21194 cut-off events. [2023-08-30 04:17:30,543 INFO L131 PetriNetUnfolder]: For 2220/2220 co-relation queries the response was YES. [2023-08-30 04:17:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44360 conditions, 21194 events. 12979/21194 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 159397 event pairs, 2179 based on Foata normal form. 15/17491 useless extension candidates. Maximal degree in co-relation 44303. Up to 16578 conditions per place. [2023-08-30 04:17:30,636 INFO L137 encePairwiseOnDemand]: 564/570 looper letters, 153 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2023-08-30 04:17:30,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 178 transitions, 807 flow [2023-08-30 04:17:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1371 transitions. [2023-08-30 04:17:30,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48105263157894734 [2023-08-30 04:17:30,640 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1371 transitions. [2023-08-30 04:17:30,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1371 transitions. [2023-08-30 04:17:30,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:30,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1371 transitions. [2023-08-30 04:17:30,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,645 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 329 flow. Second operand 5 states and 1371 transitions. [2023-08-30 04:17:30,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 178 transitions, 807 flow [2023-08-30 04:17:30,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 806 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:30,654 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 342 flow [2023-08-30 04:17:30,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2023-08-30 04:17:30,654 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 17 predicate places. [2023-08-30 04:17:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 342 flow [2023-08-30 04:17:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:30,655 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:30,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 04:17:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:30,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:30,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1401598592, now seen corresponding path program 1 times [2023-08-30 04:17:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054819611] [2023-08-30 04:17:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054819611] [2023-08-30 04:17:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054819611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:31,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158290679] [2023-08-30 04:17:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:31,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 570 [2023-08-30 04:17:31,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:31,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 570 [2023-08-30 04:17:31,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:33,085 INFO L130 PetriNetUnfolder]: 15414/25329 cut-off events. [2023-08-30 04:17:33,086 INFO L131 PetriNetUnfolder]: For 4663/4663 co-relation queries the response was YES. [2023-08-30 04:17:33,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55330 conditions, 25329 events. 15414/25329 cut-off events. For 4663/4663 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 197162 event pairs, 5126 based on Foata normal form. 132/21325 useless extension candidates. Maximal degree in co-relation 55272. Up to 16229 conditions per place. [2023-08-30 04:17:33,176 INFO L137 encePairwiseOnDemand]: 550/570 looper letters, 183 selfloop transitions, 17 changer transitions 0/215 dead transitions. [2023-08-30 04:17:33,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 215 transitions, 1066 flow [2023-08-30 04:17:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1299 transitions. [2023-08-30 04:17:33,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557894736842105 [2023-08-30 04:17:33,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1299 transitions. [2023-08-30 04:17:33,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1299 transitions. [2023-08-30 04:17:33,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:33,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1299 transitions. [2023-08-30 04:17:33,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.8) internal successors, (1299), 5 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:33,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:33,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:33,183 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 342 flow. Second operand 5 states and 1299 transitions. [2023-08-30 04:17:33,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 215 transitions, 1066 flow [2023-08-30 04:17:33,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 215 transitions, 1033 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 04:17:33,209 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 482 flow [2023-08-30 04:17:33,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-08-30 04:17:33,210 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 22 predicate places. [2023-08-30 04:17:33,210 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 482 flow [2023-08-30 04:17:33,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:33,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:33,210 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:33,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:17:33,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:33,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash 870728499, now seen corresponding path program 1 times [2023-08-30 04:17:33,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:33,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626341041] [2023-08-30 04:17:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:33,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 04:17:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626341041] [2023-08-30 04:17:33,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626341041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:33,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:33,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:17:33,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061635582] [2023-08-30 04:17:33,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:17:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:17:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:17:33,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 570 [2023-08-30 04:17:33,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 116 transitions, 482 flow. Second operand has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:33,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:33,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 570 [2023-08-30 04:17:33,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:35,175 INFO L130 PetriNetUnfolder]: 12965/21653 cut-off events. [2023-08-30 04:17:35,175 INFO L131 PetriNetUnfolder]: For 8514/8616 co-relation queries the response was YES. [2023-08-30 04:17:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51634 conditions, 21653 events. 12965/21653 cut-off events. For 8514/8616 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 168233 event pairs, 2815 based on Foata normal form. 937/20107 useless extension candidates. Maximal degree in co-relation 51571. Up to 16077 conditions per place. [2023-08-30 04:17:35,270 INFO L137 encePairwiseOnDemand]: 563/570 looper letters, 179 selfloop transitions, 19 changer transitions 0/213 dead transitions. [2023-08-30 04:17:35,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 1227 flow [2023-08-30 04:17:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1499 transitions. [2023-08-30 04:17:35,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383040935672515 [2023-08-30 04:17:35,274 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1499 transitions. [2023-08-30 04:17:35,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1499 transitions. [2023-08-30 04:17:35,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:35,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1499 transitions. [2023-08-30 04:17:35,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,279 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,279 INFO L175 Difference]: Start difference. First operand has 125 places, 116 transitions, 482 flow. Second operand 6 states and 1499 transitions. [2023-08-30 04:17:35,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 1227 flow [2023-08-30 04:17:35,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 1227 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:35,305 INFO L231 Difference]: Finished difference. Result has 127 places, 122 transitions, 580 flow [2023-08-30 04:17:35,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=580, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2023-08-30 04:17:35,305 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 24 predicate places. [2023-08-30 04:17:35,305 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 580 flow [2023-08-30 04:17:35,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:35,306 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:17:35,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:17:35,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:35,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1208874555, now seen corresponding path program 1 times [2023-08-30 04:17:35,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:35,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421402375] [2023-08-30 04:17:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:35,339 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:17:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:35,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:17:35,366 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2023-08-30 04:17:35,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-08-30 04:17:35,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:17:35,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:17:35,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:17:35,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:17:35,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:17:35,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:17:35,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:17:35,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:17:35,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:17:35,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:17:35,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:17:35,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:17:35,374 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:35,374 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:17:35,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:17:35,404 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:17:35,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,465 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-08-30 04:17:35,465 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 04:17:35,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:17:35,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:17:35,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:17:35,533 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-08-30 04:17:35,533 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 04:17:35,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:17:35,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 83304 [2023-08-30 04:17:39,731 INFO L134 LiptonReduction]: Checked pairs total: 181343 [2023-08-30 04:17:39,731 INFO L136 LiptonReduction]: Total number of compositions: 333 [2023-08-30 04:17:39,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:39,732 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;@2a917d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:39,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:17:39,733 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:17:39,733 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:39,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:39,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:39,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:39,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2293339, now seen corresponding path program 1 times [2023-08-30 04:17:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955716438] [2023-08-30 04:17:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:39,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955716438] [2023-08-30 04:17:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955716438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:39,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:39,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745549667] [2023-08-30 04:17:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:39,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:39,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 711 [2023-08-30 04:17:39,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:39,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:39,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 711 [2023-08-30 04:17:39,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand