./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.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_61-invariant_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --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 04:13:58,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:13:58,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:13:58,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:13:58,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:13:58,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:13:58,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:13:58,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:13:58,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:13:58,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:13:58,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:13:58,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:13:58,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:13:58,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:13:58,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:13:58,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:13:58,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:13:58,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:13:58,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:13:58,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:13:58,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:13:58,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:13:58,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:13:58,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:13:58,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:13:58,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:13:58,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:13:58,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:13:58,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:13:58,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:13:58,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:13:58,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:13:58,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:13:58,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:13:58,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:13:58,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:13:58,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:13:58,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:13:58,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:13:58,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:13:58,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:13:58,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:13:58,229 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:13:58,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:13:58,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:13:58,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:13:58,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:13:58,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:13:58,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:13:58,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:13:58,233 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:13:58,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:13:58,234 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:13:58,235 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:13:58,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:13:58,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:13:58,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:13:58,235 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:13:58,236 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:13:58,236 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:13:58,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:13:58,236 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:13:58,236 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:13:58,237 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:13:58,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:13:58,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:13:58,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:13:58,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:13:58,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:13:58,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:13:58,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:13:58,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:13:58,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:13:58,239 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:13:58,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:13:58,240 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:13:58,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:13:58,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:13:58,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:13:58,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:13:58,586 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:13:58,586 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:13:58,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-30 04:13:59,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:13:59,903 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:13:59,904 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-30 04:13:59,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69d86da6/be9ee6dc2ea94fb29aee80e2e84471ff/FLAGa3ca333c0 [2023-08-30 04:13:59,942 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69d86da6/be9ee6dc2ea94fb29aee80e2e84471ff [2023-08-30 04:13:59,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:13:59,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:13:59,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:13:59,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:13:59,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:13:59,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:13:59" (1/1) ... [2023-08-30 04:13:59,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f67ca2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:59, skipping insertion in model container [2023-08-30 04:13:59,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:13:59" (1/1) ... [2023-08-30 04:13:59,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:13:59,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:14:00,285 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_61-invariant_racing.i[30176,30189] [2023-08-30 04:14:00,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:14:00,325 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:14:00,373 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_61-invariant_racing.i[30176,30189] [2023-08-30 04:14:00,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:14:00,480 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:14:00,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00 WrapperNode [2023-08-30 04:14:00,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:14:00,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:14:00,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:14:00,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:14:00,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,554 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-08-30 04:14:00,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:14:00,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:14:00,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:14:00,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:14:00,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:14:00,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:14:00,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:14:00,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:14:00,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (1/1) ... [2023-08-30 04:14:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:14:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:00,646 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 04:14:00,667 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 04:14:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:14:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:14:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:14:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:14:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:14:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:14:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:14:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:14:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:14:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:14:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:14:00,694 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 04:14:00,824 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:14:00,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:14:01,029 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:14:01,036 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:14:01,036 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 04:14:01,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:14:01 BoogieIcfgContainer [2023-08-30 04:14:01,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:14:01,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:14:01,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:14:01,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:14:01,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:13:59" (1/3) ... [2023-08-30 04:14:01,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62821940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:14:01, skipping insertion in model container [2023-08-30 04:14:01,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:00" (2/3) ... [2023-08-30 04:14:01,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62821940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:14:01, skipping insertion in model container [2023-08-30 04:14:01,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:14:01" (3/3) ... [2023-08-30 04:14:01,051 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-08-30 04:14:01,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:14:01,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:14:01,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:14:01,114 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:14:01,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,223 INFO L130 PetriNetUnfolder]: 30/194 cut-off events. [2023-08-30 04:14:01,223 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:01,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 194 events. 30/194 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 608 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-30 04:14:01,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:01,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 132 transitions, 272 flow [2023-08-30 04:14:01,282 INFO L130 PetriNetUnfolder]: 30/194 cut-off events. [2023-08-30 04:14:01,282 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:01,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 194 events. 30/194 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 608 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-30 04:14:01,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 4216 [2023-08-30 04:14:04,020 INFO L134 LiptonReduction]: Checked pairs total: 13510 [2023-08-30 04:14:04,020 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-30 04:14:04,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:04,041 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;@42c5af78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:04,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:14:04,044 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:14:04,044 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:04,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:04,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:04,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:04,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 16045, now seen corresponding path program 1 times [2023-08-30 04:14:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797492446] [2023-08-30 04:14:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:04,329 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 04:14:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797492446] [2023-08-30 04:14:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797492446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:04,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119490664] [2023-08-30 04:14:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 232 [2023-08-30 04:14:04,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 04:14:04,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:04,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 232 [2023-08-30 04:14:04,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:04,571 INFO L130 PetriNetUnfolder]: 201/486 cut-off events. [2023-08-30 04:14:04,571 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:04,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 486 events. 201/486 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2278 event pairs, 0 based on Foata normal form. 69/445 useless extension candidates. Maximal degree in co-relation 875. Up to 408 conditions per place. [2023-08-30 04:14:04,581 INFO L137 encePairwiseOnDemand]: 214/232 looper letters, 43 selfloop transitions, 2 changer transitions 1/57 dead transitions. [2023-08-30 04:14:04,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 214 flow [2023-08-30 04:14:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 04:14:04,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589080459770115 [2023-08-30 04:14:04,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 04:14:04,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 04:14:04,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:04,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 04:14:04,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 04:14:04,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 04:14:04,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 04:14:04,610 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 126 flow. Second operand 3 states and 389 transitions. [2023-08-30 04:14:04,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 214 flow [2023-08-30 04:14:04,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:04,615 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 106 flow [2023-08-30 04:14:04,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-30 04:14:04,620 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-30 04:14:04,620 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 106 flow [2023-08-30 04:14:04,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 04:14:04,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:04,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:14:04,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:04,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash 16044, now seen corresponding path program 1 times [2023-08-30 04:14:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:04,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533197442] [2023-08-30 04:14:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:04,665 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 04:14:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533197442] [2023-08-30 04:14:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533197442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:04,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:04,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097481791] [2023-08-30 04:14:04,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:04,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 232 [2023-08-30 04:14:04,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 04:14:04,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:04,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 232 [2023-08-30 04:14:04,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:04,787 INFO L130 PetriNetUnfolder]: 171/418 cut-off events. [2023-08-30 04:14:04,788 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:14:04,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 418 events. 171/418 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1803 event pairs, 144 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 799. Up to 337 conditions per place. [2023-08-30 04:14:04,790 INFO L137 encePairwiseOnDemand]: 228/232 looper letters, 39 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 04:14:04,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 204 flow [2023-08-30 04:14:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-30 04:14:04,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100574712643678 [2023-08-30 04:14:04,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-30 04:14:04,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-30 04:14:04,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:04,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-30 04:14:04,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 04:14:04,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 04:14:04,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 04:14:04,798 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 106 flow. Second operand 3 states and 355 transitions. [2023-08-30 04:14:04,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 204 flow [2023-08-30 04:14:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:14:04,800 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 102 flow [2023-08-30 04:14:04,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 04:14:04,801 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-30 04:14:04,801 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 102 flow [2023-08-30 04:14:04,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 04:14:04,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:04,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:14:04,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:14:04,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:04,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 478397753, now seen corresponding path program 1 times [2023-08-30 04:14:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:04,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271422350] [2023-08-30 04:14:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:04,940 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 04:14:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:04,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271422350] [2023-08-30 04:14:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271422350] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:04,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510799004] [2023-08-30 04:14:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:04,949 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 04:14:04,975 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 04:14:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:05,101 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 04:14:05,164 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 04:14:05,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:05,242 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 04:14:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510799004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:05,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:05,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:14:05,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254137199] [2023-08-30 04:14:05,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:05,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:05,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:05,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 232 [2023-08-30 04:14:05,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 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 04:14:05,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:05,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 232 [2023-08-30 04:14:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:05,500 INFO L130 PetriNetUnfolder]: 21/68 cut-off events. [2023-08-30 04:14:05,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:05,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 68 events. 21/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 169 event pairs, 0 based on Foata normal form. 10/74 useless extension candidates. Maximal degree in co-relation 141. Up to 40 conditions per place. [2023-08-30 04:14:05,502 INFO L137 encePairwiseOnDemand]: 228/232 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-30 04:14:05,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 121 flow [2023-08-30 04:14:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:14:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:14:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 439 transitions. [2023-08-30 04:14:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730603448275862 [2023-08-30 04:14:05,510 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 439 transitions. [2023-08-30 04:14:05,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 439 transitions. [2023-08-30 04:14:05,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:05,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 439 transitions. [2023-08-30 04:14:05,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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 04:14:05,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 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 04:14:05,514 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 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 04:14:05,514 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 102 flow. Second operand 4 states and 439 transitions. [2023-08-30 04:14:05,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 121 flow [2023-08-30 04:14:05,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:14:05,516 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 50 flow [2023-08-30 04:14:05,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-08-30 04:14:05,516 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -20 predicate places. [2023-08-30 04:14:05,517 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 50 flow [2023-08-30 04:14:05,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 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 04:14:05,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:05,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:14:05,537 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 04:14:05,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:05,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:05,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1945428856, now seen corresponding path program 1 times [2023-08-30 04:14:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:05,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657270686] [2023-08-30 04:14:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:05,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:05,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:05,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:05,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:05,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:14:05,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:14:05,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:14:05,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:14:05,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:14:05,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:14:05,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:14:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:14:05,760 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:14:05,762 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:05,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:14:05,799 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:14:05,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,843 INFO L130 PetriNetUnfolder]: 51/318 cut-off events. [2023-08-30 04:14:05,846 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:14:05,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 51/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1127 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 9 conditions per place. [2023-08-30 04:14:05,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:05,852 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 165 transitions, 348 flow [2023-08-30 04:14:05,892 INFO L130 PetriNetUnfolder]: 51/318 cut-off events. [2023-08-30 04:14:05,892 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:14:05,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 51/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1127 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 9 conditions per place. [2023-08-30 04:14:05,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 11036 [2023-08-30 04:14:08,297 INFO L134 LiptonReduction]: Checked pairs total: 34019 [2023-08-30 04:14:08,297 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-30 04:14:08,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:08,299 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;@42c5af78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:08,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:14:08,301 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:14:08,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:08,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:08,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:08,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:08,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 25927, now seen corresponding path program 1 times [2023-08-30 04:14:08,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:08,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212703559] [2023-08-30 04:14:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:08,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:08,358 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 04:14:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:08,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212703559] [2023-08-30 04:14:08,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212703559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:08,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:08,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:08,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515341733] [2023-08-30 04:14:08,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:08,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:08,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 276 [2023-08-30 04:14:08,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 86 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 04:14:08,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:08,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 276 [2023-08-30 04:14:08,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:08,963 INFO L130 PetriNetUnfolder]: 3704/6153 cut-off events. [2023-08-30 04:14:08,963 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 04:14:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11943 conditions, 6153 events. 3704/6153 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 40078 event pairs, 2780 based on Foata normal form. 1436/6465 useless extension candidates. Maximal degree in co-relation 3984. Up to 5717 conditions per place. [2023-08-30 04:14:08,995 INFO L137 encePairwiseOnDemand]: 251/276 looper letters, 52 selfloop transitions, 2 changer transitions 2/76 dead transitions. [2023-08-30 04:14:08,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 282 flow [2023-08-30 04:14:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-30 04:14:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5809178743961353 [2023-08-30 04:14:08,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-30 04:14:08,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-30 04:14:08,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:08,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-30 04:14:08,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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 04:14:09,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 04:14:09,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 04:14:09,002 INFO L175 Difference]: Start difference. First operand has 66 places, 86 transitions, 190 flow. Second operand 3 states and 481 transitions. [2023-08-30 04:14:09,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 282 flow [2023-08-30 04:14:09,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:09,004 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 158 flow [2023-08-30 04:14:09,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-30 04:14:09,005 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-30 04:14:09,005 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 158 flow [2023-08-30 04:14:09,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 04:14:09,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:09,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:14:09,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:09,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:09,007 INFO L85 PathProgramCache]: Analyzing trace with hash 25929, now seen corresponding path program 1 times [2023-08-30 04:14:09,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:09,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840978737] [2023-08-30 04:14:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:09,027 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 04:14:09,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:09,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840978737] [2023-08-30 04:14:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840978737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:09,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:09,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259004805] [2023-08-30 04:14:09,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:09,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:09,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:09,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 276 [2023-08-30 04:14:09,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 04:14:09,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:09,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 276 [2023-08-30 04:14:09,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:09,504 INFO L130 PetriNetUnfolder]: 3012/5086 cut-off events. [2023-08-30 04:14:09,504 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 04:14:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10084 conditions, 5086 events. 3012/5086 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 32553 event pairs, 2497 based on Foata normal form. 0/4461 useless extension candidates. Maximal degree in co-relation 10013. Up to 4384 conditions per place. [2023-08-30 04:14:09,534 INFO L137 encePairwiseOnDemand]: 272/276 looper letters, 58 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-30 04:14:09,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 310 flow [2023-08-30 04:14:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-30 04:14:09,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2023-08-30 04:14:09,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-30 04:14:09,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-30 04:14:09,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:09,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-30 04:14:09,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 04:14:09,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 04:14:09,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 04:14:09,541 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 158 flow. Second operand 3 states and 448 transitions. [2023-08-30 04:14:09,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 310 flow [2023-08-30 04:14:09,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:09,546 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 156 flow [2023-08-30 04:14:09,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-30 04:14:09,551 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-30 04:14:09,552 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 156 flow [2023-08-30 04:14:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 04:14:09,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:09,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:14:09,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:14:09,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:09,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1804369118, now seen corresponding path program 1 times [2023-08-30 04:14:09,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:09,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983076663] [2023-08-30 04:14:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:09,668 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 04:14:09,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:09,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983076663] [2023-08-30 04:14:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983076663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:09,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80908694] [2023-08-30 04:14:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:09,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:09,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:09,673 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 04:14:09,684 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 04:14:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:09,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:09,751 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 04:14:09,836 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 04:14:09,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:09,882 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 04:14:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80908694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:09,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:09,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:14:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44972002] [2023-08-30 04:14:09,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:09,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:09,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 276 [2023-08-30 04:14:09,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 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 04:14:09,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:09,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 276 [2023-08-30 04:14:09,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:10,140 INFO L130 PetriNetUnfolder]: 425/817 cut-off events. [2023-08-30 04:14:10,140 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 04:14:10,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 817 events. 425/817 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4254 event pairs, 55 based on Foata normal form. 88/864 useless extension candidates. Maximal degree in co-relation 1780. Up to 480 conditions per place. [2023-08-30 04:14:10,145 INFO L137 encePairwiseOnDemand]: 272/276 looper letters, 49 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-30 04:14:10,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 256 flow [2023-08-30 04:14:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:14:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:14:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2023-08-30 04:14:10,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043478260869565 [2023-08-30 04:14:10,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2023-08-30 04:14:10,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2023-08-30 04:14:10,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:10,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2023-08-30 04:14:10,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 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 04:14:10,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 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 04:14:10,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 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 04:14:10,152 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 156 flow. Second operand 5 states and 696 transitions. [2023-08-30 04:14:10,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 256 flow [2023-08-30 04:14:10,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 253 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:10,155 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 99 flow [2023-08-30 04:14:10,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-30 04:14:10,156 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -19 predicate places. [2023-08-30 04:14:10,156 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 99 flow [2023-08-30 04:14:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 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 04:14:10,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:10,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:14:10,175 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 04:14:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 04:14:10,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:10,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 666324573, now seen corresponding path program 1 times [2023-08-30 04:14:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:10,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711376628] [2023-08-30 04:14:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:10,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:10,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:10,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:10,395 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:10,395 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:14:10,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:14:10,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:14:10,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:14:10,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:14:10,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:14:10,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:14:10,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:14:10,396 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:14:10,397 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:10,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:14:10,427 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:14:10,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,476 INFO L130 PetriNetUnfolder]: 77/483 cut-off events. [2023-08-30 04:14:10,477 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:14:10,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 483 events. 77/483 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1880 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2023-08-30 04:14:10,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:10,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 198 transitions, 426 flow [2023-08-30 04:14:10,524 INFO L130 PetriNetUnfolder]: 77/483 cut-off events. [2023-08-30 04:14:10,525 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:14:10,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 483 events. 77/483 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1880 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2023-08-30 04:14:10,543 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-08-30 04:14:12,907 INFO L134 LiptonReduction]: Checked pairs total: 58086 [2023-08-30 04:14:12,907 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-30 04:14:12,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:12,909 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;@42c5af78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:12,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:14:12,911 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:14:12,911 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:12,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:12,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:12,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:12,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 37360, now seen corresponding path program 1 times [2023-08-30 04:14:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:12,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949435342] [2023-08-30 04:14:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:12,947 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 04:14:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949435342] [2023-08-30 04:14:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949435342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:12,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302986016] [2023-08-30 04:14:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:12,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:12,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:12,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 324 [2023-08-30 04:14:12,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 109 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 04:14:12,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:12,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 324 [2023-08-30 04:14:12,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:17,656 INFO L130 PetriNetUnfolder]: 42803/63102 cut-off events. [2023-08-30 04:14:17,656 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-08-30 04:14:17,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122038 conditions, 63102 events. 42803/63102 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 479607 event pairs, 24523 based on Foata normal form. 11606/67230 useless extension candidates. Maximal degree in co-relation 11076. Up to 58257 conditions per place. [2023-08-30 04:14:17,989 INFO L137 encePairwiseOnDemand]: 293/324 looper letters, 61 selfloop transitions, 2 changer transitions 2/93 dead transitions. [2023-08-30 04:14:17,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 93 transitions, 346 flow [2023-08-30 04:14:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-08-30 04:14:17,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5874485596707819 [2023-08-30 04:14:17,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-08-30 04:14:17,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-08-30 04:14:17,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:17,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-08-30 04:14:17,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 04:14:17,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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 04:14:17,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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 04:14:17,997 INFO L175 Difference]: Start difference. First operand has 83 places, 109 transitions, 248 flow. Second operand 3 states and 571 transitions. [2023-08-30 04:14:17,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 93 transitions, 346 flow [2023-08-30 04:14:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 93 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:18,001 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 204 flow [2023-08-30 04:14:18,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-08-30 04:14:18,003 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2023-08-30 04:14:18,003 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 204 flow [2023-08-30 04:14:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 04:14:18,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:18,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:14:18,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:18,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 37358, now seen corresponding path program 1 times [2023-08-30 04:14:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448732035] [2023-08-30 04:14:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:18,026 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 04:14:18,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448732035] [2023-08-30 04:14:18,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448732035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:18,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:18,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:18,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211444159] [2023-08-30 04:14:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:18,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:18,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:18,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 324 [2023-08-30 04:14:18,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 04:14:18,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:18,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 324 [2023-08-30 04:14:18,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:21,240 INFO L130 PetriNetUnfolder]: 34737/50953 cut-off events. [2023-08-30 04:14:21,240 INFO L131 PetriNetUnfolder]: For 2062/2062 co-relation queries the response was YES. [2023-08-30 04:14:21,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100831 conditions, 50953 events. 34737/50953 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 1416. Compared 376082 event pairs, 28492 based on Foata normal form. 0/47054 useless extension candidates. Maximal degree in co-relation 100759. Up to 44306 conditions per place. [2023-08-30 04:14:21,538 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 74 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-30 04:14:21,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 402 flow [2023-08-30 04:14:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 04:14:21,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545267489711934 [2023-08-30 04:14:21,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 04:14:21,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 04:14:21,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:21,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 04:14:21,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 04:14:21,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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 04:14:21,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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 04:14:21,543 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 204 flow. Second operand 3 states and 539 transitions. [2023-08-30 04:14:21,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 402 flow [2023-08-30 04:14:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:21,547 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 202 flow [2023-08-30 04:14:21,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-30 04:14:21,548 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 0 predicate places. [2023-08-30 04:14:21,548 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 202 flow [2023-08-30 04:14:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 04:14:21,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:21,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:14:21,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:14:21,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:21,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash 172902163, now seen corresponding path program 1 times [2023-08-30 04:14:21,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:21,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598668760] [2023-08-30 04:14:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:21,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:21,609 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 04:14:21,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598668760] [2023-08-30 04:14:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598668760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:21,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929550154] [2023-08-30 04:14:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:21,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:21,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:21,614 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 04:14:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:21,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:21,691 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 04:14:21,726 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 04:14:21,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:21,771 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 04:14:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929550154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:21,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:14:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392014716] [2023-08-30 04:14:21,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:21,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 324 [2023-08-30 04:14:21,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 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 04:14:21,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:21,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 324 [2023-08-30 04:14:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:22,624 INFO L130 PetriNetUnfolder]: 5017/7982 cut-off events. [2023-08-30 04:14:22,624 INFO L131 PetriNetUnfolder]: For 2201/2201 co-relation queries the response was YES. [2023-08-30 04:14:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16844 conditions, 7982 events. 5017/7982 cut-off events. For 2201/2201 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 53045 event pairs, 429 based on Foata normal form. 648/8416 useless extension candidates. Maximal degree in co-relation 16833. Up to 4608 conditions per place. [2023-08-30 04:14:22,648 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 81 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-30 04:14:22,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 415 flow [2023-08-30 04:14:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:14:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:14:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1009 transitions. [2023-08-30 04:14:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190329218106996 [2023-08-30 04:14:22,652 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1009 transitions. [2023-08-30 04:14:22,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1009 transitions. [2023-08-30 04:14:22,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:22,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1009 transitions. [2023-08-30 04:14:22,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.16666666666666) internal successors, (1009), 6 states have internal predecessors, (1009), 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 04:14:22,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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 04:14:22,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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 04:14:22,658 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 202 flow. Second operand 6 states and 1009 transitions. [2023-08-30 04:14:22,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 415 flow [2023-08-30 04:14:22,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 408 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:22,662 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 142 flow [2023-08-30 04:14:22,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-30 04:14:22,663 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -18 predicate places. [2023-08-30 04:14:22,663 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 142 flow [2023-08-30 04:14:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 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 04:14:22,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:22,663 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:14:22,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:14:22,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:22,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:22,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -639064039, now seen corresponding path program 1 times [2023-08-30 04:14:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:22,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679408095] [2023-08-30 04:14:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:22,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:22,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:22,911 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:22,911 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:14:22,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:14:22,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:14:22,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:14:22,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:14:22,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:14:22,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:14:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:14:22,913 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:14:22,913 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:22,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:14:22,943 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:14:22,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,019 INFO L130 PetriNetUnfolder]: 115/732 cut-off events. [2023-08-30 04:14:23,019 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:14:23,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 732 events. 115/732 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3205 event pairs, 6 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 503. Up to 32 conditions per place. [2023-08-30 04:14:23,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,035 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:23,035 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 231 transitions, 506 flow [2023-08-30 04:14:23,102 INFO L130 PetriNetUnfolder]: 115/732 cut-off events. [2023-08-30 04:14:23,102 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:14:23,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 732 events. 115/732 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3205 event pairs, 6 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 503. Up to 32 conditions per place. [2023-08-30 04:14:23,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 30504 [2023-08-30 04:14:25,512 INFO L134 LiptonReduction]: Checked pairs total: 107268 [2023-08-30 04:14:25,512 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-30 04:14:25,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:25,514 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;@42c5af78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:25,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:14:25,515 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:14:25,515 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:25,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:25,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:25,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:14:25,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 50405, now seen corresponding path program 1 times [2023-08-30 04:14:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961296761] [2023-08-30 04:14:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:25,544 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 04:14:25,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961296761] [2023-08-30 04:14:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961296761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:25,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:25,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867400662] [2023-08-30 04:14:25,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:25,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 375 [2023-08-30 04:14:25,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 04:14:25,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:25,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 375 [2023-08-30 04:14:25,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:33,640 INFO L130 PetriNetUnfolder]: 737208/1008775 cut-off events. [2023-08-30 04:15:33,641 INFO L131 PetriNetUnfolder]: For 19957/19957 co-relation queries the response was YES. [2023-08-30 04:15:36,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953503 conditions, 1008775 events. 737208/1008775 cut-off events. For 19957/19957 co-relation queries the response was YES. Maximal size of possible extension queue 21548. Compared 8498193 event pairs, 579888 based on Foata normal form. 148351/1029026 useless extension candidates. Maximal degree in co-relation 189117. Up to 824378 conditions per place. [2023-08-30 04:15:41,731 INFO L137 encePairwiseOnDemand]: 337/375 looper letters, 101 selfloop transitions, 2 changer transitions 2/135 dead transitions. [2023-08-30 04:15:41,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 524 flow [2023-08-30 04:15:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2023-08-30 04:15:41,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231111111111111 [2023-08-30 04:15:41,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2023-08-30 04:15:41,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2023-08-30 04:15:41,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:41,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2023-08-30 04:15:41,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 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 04:15:41,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 04:15:41,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 04:15:41,757 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 308 flow. Second operand 3 states and 701 transitions. [2023-08-30 04:15:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 524 flow [2023-08-30 04:15:41,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 135 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:41,779 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 238 flow [2023-08-30 04:15:41,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2023-08-30 04:15:41,780 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 0 predicate places. [2023-08-30 04:15:41,780 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 238 flow [2023-08-30 04:15:41,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 04:15:41,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:41,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:15:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:15:41,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:15:41,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 50406, now seen corresponding path program 1 times [2023-08-30 04:15:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586977402] [2023-08-30 04:15:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:41,866 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 04:15:41,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:41,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586977402] [2023-08-30 04:15:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586977402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:15:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79380800] [2023-08-30 04:15:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:41,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:41,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 375 [2023-08-30 04:15:41,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:41,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:41,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 375 [2023-08-30 04:15:41,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:51,065 INFO L130 PetriNetUnfolder]: 659761/892277 cut-off events. [2023-08-30 04:16:51,066 INFO L131 PetriNetUnfolder]: For 21610/21610 co-relation queries the response was YES. [2023-08-30 04:16:52,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750652 conditions, 892277 events. 659761/892277 cut-off events. For 21610/21610 co-relation queries the response was YES. Maximal size of possible extension queue 18744. Compared 7219951 event pairs, 439189 based on Foata normal form. 0/807388 useless extension candidates. Maximal degree in co-relation 1628238. Up to 835777 conditions per place. [2023-08-30 04:16:56,220 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 73 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-30 04:16:56,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 408 flow [2023-08-30 04:16:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-30 04:16:56,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537777777777778 [2023-08-30 04:16:56,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-30 04:16:56,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-30 04:16:56,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:56,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-30 04:16:56,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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 04:16:56,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 04:16:56,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 04:16:56,226 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 238 flow. Second operand 3 states and 623 transitions. [2023-08-30 04:16:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 408 flow [2023-08-30 04:17:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:57,638 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 248 flow [2023-08-30 04:17:57,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-30 04:17:57,639 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -1 predicate places. [2023-08-30 04:17:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 248 flow [2023-08-30 04:17:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:57,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:57,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:17:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:17:57,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:17:57,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -652753063, now seen corresponding path program 1 times [2023-08-30 04:17:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994114818] [2023-08-30 04:17:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:57,743 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 04:17:57,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994114818] [2023-08-30 04:17:57,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994114818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848693827] [2023-08-30 04:17:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:57,762 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 04:17:57,765 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 04:17:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:57,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:57,829 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 04:17:57,859 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 04:17:57,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:57,896 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 04:17:57,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848693827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:57,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:57,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:17:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845544829] [2023-08-30 04:17:57,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:57,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 375 [2023-08-30 04:17:57,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 180.71428571428572) internal successors, (1265), 7 states have internal predecessors, (1265), 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 04:17:57,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:57,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 375 [2023-08-30 04:17:57,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:56,827 INFO L130 PetriNetUnfolder]: 668073/898067 cut-off events. [2023-08-30 04:18:56,827 INFO L131 PetriNetUnfolder]: For 35394/35394 co-relation queries the response was YES. [2023-08-30 04:18:58,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787803 conditions, 898067 events. 668073/898067 cut-off events. For 35394/35394 co-relation queries the response was YES. Maximal size of possible extension queue 19061. Compared 7205678 event pairs, 92026 based on Foata normal form. 8/814722 useless extension candidates. Maximal degree in co-relation 259380. Up to 711625 conditions per place. [2023-08-30 04:19:02,086 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 193 selfloop transitions, 8 changer transitions 0/231 dead transitions. [2023-08-30 04:19:02,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 231 transitions, 943 flow [2023-08-30 04:19:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:19:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:19:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1279 transitions. [2023-08-30 04:19:02,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684444444444444 [2023-08-30 04:19:02,089 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1279 transitions. [2023-08-30 04:19:02,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1279 transitions. [2023-08-30 04:19:02,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:02,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1279 transitions. [2023-08-30 04:19:02,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.16666666666666) internal successors, (1279), 6 states have internal predecessors, (1279), 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 04:19:02,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 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 04:19:02,097 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 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 04:19:02,097 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 248 flow. Second operand 6 states and 1279 transitions. [2023-08-30 04:19:02,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 231 transitions, 943 flow [2023-08-30 04:19:02,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 231 transitions, 941 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:19:02,105 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 302 flow [2023-08-30 04:19:02,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-08-30 04:19:02,106 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 7 predicate places. [2023-08-30 04:19:02,106 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 302 flow [2023-08-30 04:19:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.71428571428572) internal successors, (1265), 7 states have internal predecessors, (1265), 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 04:19:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:02,107 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:19:02,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:19:02,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 04:19:02,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:19:02,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1473937900, now seen corresponding path program 1 times [2023-08-30 04:19:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:02,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720180071] [2023-08-30 04:19:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720180071] [2023-08-30 04:19:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720180071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:19:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643737983] [2023-08-30 04:19:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:19:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:19:02,457 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 04:19:02,461 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 04:19:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:19:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:19:02,555 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 04:19:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:19:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643737983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:19:02,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:19:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 04:19:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210768355] [2023-08-30 04:19:02,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:19:02,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:19:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:19:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:19:03,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 375 [2023-08-30 04:19:03,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 302 flow. Second operand has 16 states, 16 states have (on average 181.4375) internal successors, (2903), 16 states have internal predecessors, (2903), 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 04:19:03,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:03,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 375 [2023-08-30 04:19:03,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:11,946 INFO L130 PetriNetUnfolder]: 95593/135947 cut-off events. [2023-08-30 04:19:11,946 INFO L131 PetriNetUnfolder]: For 172760/172760 co-relation queries the response was YES. [2023-08-30 04:19:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324119 conditions, 135947 events. 95593/135947 cut-off events. For 172760/172760 co-relation queries the response was YES. Maximal size of possible extension queue 3859. Compared 1037973 event pairs, 5808 based on Foata normal form. 16808/144960 useless extension candidates. Maximal degree in co-relation 33840. Up to 79200 conditions per place. [2023-08-30 04:19:12,748 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 141 selfloop transitions, 5 changer transitions 0/170 dead transitions. [2023-08-30 04:19:12,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 704 flow [2023-08-30 04:19:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:19:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:19:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1403 transitions. [2023-08-30 04:19:12,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344761904761904 [2023-08-30 04:19:12,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1403 transitions. [2023-08-30 04:19:12,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1403 transitions. [2023-08-30 04:19:12,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:12,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1403 transitions. [2023-08-30 04:19:12,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.42857142857142) internal successors, (1403), 7 states have internal predecessors, (1403), 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 04:19:12,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 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 04:19:12,760 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 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 04:19:12,760 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 302 flow. Second operand 7 states and 1403 transitions. [2023-08-30 04:19:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 704 flow [2023-08-30 04:19:12,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 675 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 04:19:12,838 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 193 flow [2023-08-30 04:19:12,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2023-08-30 04:19:12,839 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -14 predicate places. [2023-08-30 04:19:12,839 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 193 flow [2023-08-30 04:19:12,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.4375) internal successors, (2903), 16 states have internal predecessors, (2903), 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 04:19:12,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:12,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:19:12,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 04:19:13,044 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,SelfDestructingSolverStorable15 [2023-08-30 04:19:13,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:19:13,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1552564024, now seen corresponding path program 1 times [2023-08-30 04:19:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:13,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066080685] [2023-08-30 04:19:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:13,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:19:13,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:19:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:19:13,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:19:13,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:19:13,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:19:13,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:19:13,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:19:13,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:19:13,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:19:13,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:19:13,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:19:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:19:13,088 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:19:13,089 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:19:13,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:19:13,118 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:19:13,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,486 INFO L130 PetriNetUnfolder]: 181/1153 cut-off events. [2023-08-30 04:19:13,487 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:19:13,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 1153 events. 181/1153 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 777. Up to 80 conditions per place. [2023-08-30 04:19:13,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:19:13,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 264 transitions, 588 flow [2023-08-30 04:19:13,585 INFO L130 PetriNetUnfolder]: 181/1153 cut-off events. [2023-08-30 04:19:13,585 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:19:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 1153 events. 181/1153 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 777. Up to 80 conditions per place. [2023-08-30 04:19:13,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 43400 [2023-08-30 04:19:16,119 INFO L134 LiptonReduction]: Checked pairs total: 155186 [2023-08-30 04:19:16,119 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-30 04:19:16,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:19:16,120 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;@42c5af78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:19:16,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:19:16,121 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:19:16,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:19:16,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:16,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:16,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:19:16,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash 65168, now seen corresponding path program 1 times [2023-08-30 04:19:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:16,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330517173] [2023-08-30 04:19:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:16,146 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 04:19:16,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:16,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330517173] [2023-08-30 04:19:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330517173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:16,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376362894] [2023-08-30 04:19:16,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:16,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 428 [2023-08-30 04:19:16,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 153 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:19:16,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:16,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 428 [2023-08-30 04:19:16,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand