./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.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/pthread/stack_longer-1.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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --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 02:19:40,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:19:40,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:19:40,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:19:40,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:19:40,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:19:40,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:19:40,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:19:40,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:19:40,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:19:40,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:19:40,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:19:40,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:19:40,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:19:40,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:19:40,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:19:40,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:19:40,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:19:40,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:19:40,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:19:40,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:19:40,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:19:40,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:19:40,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:19:40,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:19:40,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:19:40,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:19:40,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:19:40,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:19:40,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:19:40,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:19:40,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:19:40,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:19:40,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:19:40,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:19:40,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:19:40,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:19:40,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:19:40,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:19:40,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:19:40,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:19:40,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:19:40,342 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:19:40,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:19:40,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:19:40,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:19:40,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:19:40,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:19:40,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:19:40,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:19:40,346 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:19:40,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:19:40,347 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:19:40,347 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:19:40,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:19:40,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:19:40,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:19:40,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:19:40,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:19:40,352 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:19:40,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:19:40,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:19:40,353 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:19:40,353 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:19:40,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:19:40,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:19:40,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:19:40,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:40,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:19:40,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:19:40,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:19:40,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:19:40,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:19:40,355 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:19:40,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:19:40,356 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:19:40,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:19:40,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:19:40,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:19:40,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:19:40,715 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:19:40,716 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:19:40,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 02:19:41,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:19:42,258 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:19:42,259 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 02:19:42,270 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5cf60cf/2f0e765bb3564032b57f6046e13046e2/FLAG276d4e38b [2023-08-30 02:19:42,290 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5cf60cf/2f0e765bb3564032b57f6046e13046e2 [2023-08-30 02:19:42,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:19:42,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:19:42,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:42,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:19:42,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:19:42,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d684672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42, skipping insertion in model container [2023-08-30 02:19:42,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:19:42,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:19:42,761 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 02:19:42,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:42,802 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:19:42,834 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 02:19:42,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:42,903 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:19:42,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42 WrapperNode [2023-08-30 02:19:42,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:42,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:42,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:19:42,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:19:42,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,953 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-30 02:19:42,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:42,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:19:42,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:19:42,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:19:42,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:42,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:19:42,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:19:42,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:19:42,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:19:42,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (1/1) ... [2023-08-30 02:19:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:43,029 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 02:19:43,049 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 02:19:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:19:43,074 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:19:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:19:43,074 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:19:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:19:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:19:43,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:19:43,077 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 02:19:43,257 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:19:43,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:19:43,486 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:19:43,493 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:19:43,493 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:19:43,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:43 BoogieIcfgContainer [2023-08-30 02:19:43,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:19:43,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:19:43,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:19:43,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:19:43,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:19:42" (1/3) ... [2023-08-30 02:19:43,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14470b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:43, skipping insertion in model container [2023-08-30 02:19:43,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:42" (2/3) ... [2023-08-30 02:19:43,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14470b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:43, skipping insertion in model container [2023-08-30 02:19:43,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:43" (3/3) ... [2023-08-30 02:19:43,509 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-30 02:19:43,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:19:43,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:19:43,539 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:19:43,654 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:19:43,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-30 02:19:43,782 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-30 02:19:43,786 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:43,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 447 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-30 02:19:43,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-30 02:19:43,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-30 02:19:43,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:19:43,824 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-30 02:19:43,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-30 02:19:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-30 02:19:43,876 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-30 02:19:43,876 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 442 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-30 02:19:43,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-30 02:19:48,162 INFO L134 LiptonReduction]: Checked pairs total: 13763 [2023-08-30 02:19:48,162 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-30 02:19:48,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:19:48,181 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;@42bd92f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:19:48,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:19:48,183 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:19:48,183 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:19:48,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:48,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:19:48,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:48,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 709, now seen corresponding path program 1 times [2023-08-30 02:19:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125276147] [2023-08-30 02:19:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:48,398 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 02:19:48,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:48,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125276147] [2023-08-30 02:19:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125276147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:48,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:48,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:19:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970592727] [2023-08-30 02:19:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:19:48,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:19:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:19:48,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 339 [2023-08-30 02:19:48,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 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 02:19:48,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:48,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 339 [2023-08-30 02:19:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:48,752 INFO L130 PetriNetUnfolder]: 1456/2263 cut-off events. [2023-08-30 02:19:48,752 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 02:19:48,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 2263 events. 1456/2263 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10457 event pairs, 1176 based on Foata normal form. 0/1293 useless extension candidates. Maximal degree in co-relation 4296. Up to 2240 conditions per place. [2023-08-30 02:19:48,768 INFO L137 encePairwiseOnDemand]: 337/339 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-30 02:19:48,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-30 02:19:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:19:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:19:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-30 02:19:48,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486725663716814 [2023-08-30 02:19:48,782 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-30 02:19:48,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-30 02:19:48,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:48,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-30 02:19:48,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 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 02:19:48,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:19:48,799 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:19:48,801 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-30 02:19:48,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-30 02:19:48,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:19:48,806 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 02:19:48,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 02:19:48,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:19:48,811 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 02:19:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 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 02:19:48,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:48,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:19:48,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:48,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash 695919, now seen corresponding path program 1 times [2023-08-30 02:19:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:48,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085084198] [2023-08-30 02:19:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:49,098 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 02:19:49,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:49,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085084198] [2023-08-30 02:19:49,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085084198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:49,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:49,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864907504] [2023-08-30 02:19:49,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:49,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-30 02:19:49,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 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 02:19:49,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:49,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-30 02:19:49,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:49,338 INFO L130 PetriNetUnfolder]: 1427/2208 cut-off events. [2023-08-30 02:19:49,338 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 02:19:49,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 2208 events. 1427/2208 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10100 event pairs, 1152 based on Foata normal form. 0/1274 useless extension candidates. Maximal degree in co-relation 4406. Up to 2183 conditions per place. [2023-08-30 02:19:49,350 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 02:19:49,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-30 02:19:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 02:19:49,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093411996066863 [2023-08-30 02:19:49,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 02:19:49,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 02:19:49,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:49,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 02:19:49,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 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 02:19:49,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,359 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-30 02:19:49,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-30 02:19:49,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:19:49,360 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-30 02:19:49,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 02:19:49,361 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:19:49,361 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-30 02:19:49,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 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 02:19:49,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:49,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:19:49,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:49,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash 695920, now seen corresponding path program 1 times [2023-08-30 02:19:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930461718] [2023-08-30 02:19:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:49,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:49,414 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 02:19:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:49,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930461718] [2023-08-30 02:19:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930461718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:49,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:49,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558775886] [2023-08-30 02:19:49,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 339 [2023-08-30 02:19:49,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 02:19:49,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:49,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 339 [2023-08-30 02:19:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:49,656 INFO L130 PetriNetUnfolder]: 1398/2153 cut-off events. [2023-08-30 02:19:49,657 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 02:19:49,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 2153 events. 1398/2153 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9752 event pairs, 1128 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 4298. Up to 2128 conditions per place. [2023-08-30 02:19:49,670 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 02:19:49,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-30 02:19:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-30 02:19:49,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-30 02:19:49,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-30 02:19:49,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-30 02:19:49,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:49,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-30 02:19:49,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 02:19:49,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,677 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-30 02:19:49,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-30 02:19:49,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:49,680 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-30 02:19:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-30 02:19:49,681 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:19:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-30 02:19:49,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 02:19:49,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:49,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:19:49,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:49,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 668793599, now seen corresponding path program 1 times [2023-08-30 02:19:49,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:49,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443651857] [2023-08-30 02:19:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:49,756 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 02:19:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443651857] [2023-08-30 02:19:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443651857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:49,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:49,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:49,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774074566] [2023-08-30 02:19:49,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:49,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:49,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 339 [2023-08-30 02:19:49,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 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 02:19:49,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:49,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 339 [2023-08-30 02:19:49,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:49,950 INFO L130 PetriNetUnfolder]: 1021/1601 cut-off events. [2023-08-30 02:19:49,950 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 02:19:49,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3204 conditions, 1601 events. 1021/1601 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6948 event pairs, 816 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 3200. Up to 1582 conditions per place. [2023-08-30 02:19:49,959 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:19:49,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-30 02:19:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-30 02:19:49,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48180924287118976 [2023-08-30 02:19:49,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-30 02:19:49,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-30 02:19:49,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:49,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-30 02:19:49,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 02:19:49,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:49,966 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 490 transitions. [2023-08-30 02:19:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-30 02:19:49,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:49,967 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:49,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-30 02:19:49,968 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-30 02:19:49,968 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:49,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 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 02:19:49,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:49,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:19:49,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:49,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash 668793600, now seen corresponding path program 1 times [2023-08-30 02:19:49,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511438549] [2023-08-30 02:19:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:49,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:50,007 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 02:19:50,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511438549] [2023-08-30 02:19:50,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511438549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:50,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:50,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:50,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087743778] [2023-08-30 02:19:50,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:50,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:50,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 339 [2023-08-30 02:19:50,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 02:19:50,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:50,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 339 [2023-08-30 02:19:50,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:50,152 INFO L130 PetriNetUnfolder]: 644/1049 cut-off events. [2023-08-30 02:19:50,152 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 02:19:50,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 1049 events. 644/1049 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4379 event pairs, 504 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 2102. Up to 1036 conditions per place. [2023-08-30 02:19:50,158 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:19:50,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-30 02:19:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-30 02:19:50,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-30 02:19:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-30 02:19:50,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-30 02:19:50,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:50,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-30 02:19:50,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 02:19:50,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:50,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:50,165 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 504 transitions. [2023-08-30 02:19:50,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-30 02:19:50,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:50,166 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:50,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:19:50,167 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-30 02:19:50,167 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:50,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 02:19:50,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:50,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:50,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:19:50,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:50,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -742837340, now seen corresponding path program 1 times [2023-08-30 02:19:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780864670] [2023-08-30 02:19:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:50,287 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 02:19:50,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:50,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780864670] [2023-08-30 02:19:50,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780864670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716872309] [2023-08-30 02:19:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:50,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-30 02:19:50,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 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 02:19:50,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:50,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-30 02:19:50,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:50,549 INFO L130 PetriNetUnfolder]: 793/1277 cut-off events. [2023-08-30 02:19:50,549 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 02:19:50,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1277 events. 793/1277 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5739 event pairs, 153 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 2565. Up to 944 conditions per place. [2023-08-30 02:19:50,556 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 58 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-08-30 02:19:50,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 267 flow [2023-08-30 02:19:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:19:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:19:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-30 02:19:50,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073746312684366 [2023-08-30 02:19:50,559 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-30 02:19:50,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-30 02:19:50,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:50,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-30 02:19:50,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 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 02:19:50,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 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 02:19:50,565 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 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 02:19:50,565 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 4 states and 688 transitions. [2023-08-30 02:19:50,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 267 flow [2023-08-30 02:19:50,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:50,568 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 104 flow [2023-08-30 02:19:50,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-30 02:19:50,571 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-30 02:19:50,571 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 104 flow [2023-08-30 02:19:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 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 02:19:50,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:50,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:19:50,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:50,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -742837339, now seen corresponding path program 1 times [2023-08-30 02:19:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260495573] [2023-08-30 02:19:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:50,863 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 02:19:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260495573] [2023-08-30 02:19:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260495573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:50,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:50,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:50,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388096682] [2023-08-30 02:19:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:50,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-30 02:19:50,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 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 02:19:50,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:50,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-30 02:19:50,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:51,149 INFO L130 PetriNetUnfolder]: 1053/1715 cut-off events. [2023-08-30 02:19:51,159 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 02:19:51,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1715 events. 1053/1715 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7674 event pairs, 161 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 3624. Up to 1262 conditions per place. [2023-08-30 02:19:51,165 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-30 02:19:51,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 81 transitions, 354 flow [2023-08-30 02:19:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:19:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:19:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-30 02:19:51,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213864306784661 [2023-08-30 02:19:51,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-30 02:19:51,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-30 02:19:51,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:51,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-30 02:19:51,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 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 02:19:51,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 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 02:19:51,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 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 02:19:51,173 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 104 flow. Second operand 4 states and 707 transitions. [2023-08-30 02:19:51,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 81 transitions, 354 flow [2023-08-30 02:19:51,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:51,177 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 138 flow [2023-08-30 02:19:51,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 02:19:51,178 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-30 02:19:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 138 flow [2023-08-30 02:19:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 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 02:19:51,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:51,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:19:51,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:51,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1408310531, now seen corresponding path program 1 times [2023-08-30 02:19:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:51,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198845230] [2023-08-30 02:19:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:51,230 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 02:19:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198845230] [2023-08-30 02:19:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198845230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:51,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:51,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982921128] [2023-08-30 02:19:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:51,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 339 [2023-08-30 02:19:51,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 02:19:51,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:51,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 339 [2023-08-30 02:19:51,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:51,371 INFO L130 PetriNetUnfolder]: 702/1159 cut-off events. [2023-08-30 02:19:51,372 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 02:19:51,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2536 conditions, 1159 events. 702/1159 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4447 event pairs, 315 based on Foata normal form. 22/933 useless extension candidates. Maximal degree in co-relation 2529. Up to 900 conditions per place. [2023-08-30 02:19:51,378 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 55 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 02:19:51,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 265 flow [2023-08-30 02:19:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 02:19:51,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290068829891839 [2023-08-30 02:19:51,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 02:19:51,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 02:19:51,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:51,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 02:19:51,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 02:19:51,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,385 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 138 flow. Second operand 3 states and 538 transitions. [2023-08-30 02:19:51,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 265 flow [2023-08-30 02:19:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 02:19:51,389 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 118 flow [2023-08-30 02:19:51,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-30 02:19:51,392 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-30 02:19:51,392 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 118 flow [2023-08-30 02:19:51,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 02:19:51,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:51,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:19:51,393 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:51,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 635935809, now seen corresponding path program 1 times [2023-08-30 02:19:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:51,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570027972] [2023-08-30 02:19:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:51,447 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 02:19:51,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:51,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570027972] [2023-08-30 02:19:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570027972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:51,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723361301] [2023-08-30 02:19:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:51,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-30 02:19:51,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 02:19:51,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:51,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-30 02:19:51,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:51,608 INFO L130 PetriNetUnfolder]: 733/1208 cut-off events. [2023-08-30 02:19:51,609 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-30 02:19:51,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1208 events. 733/1208 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4721 event pairs, 528 based on Foata normal form. 38/1028 useless extension candidates. Maximal degree in co-relation 2685. Up to 1102 conditions per place. [2023-08-30 02:19:51,615 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 56 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-30 02:19:51,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 281 flow [2023-08-30 02:19:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-30 02:19:51,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5250737463126843 [2023-08-30 02:19:51,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-30 02:19:51,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-30 02:19:51,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:51,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-30 02:19:51,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 02:19:51,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,622 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 118 flow. Second operand 3 states and 534 transitions. [2023-08-30 02:19:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 281 flow [2023-08-30 02:19:51,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:51,624 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 136 flow [2023-08-30 02:19:51,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 02:19:51,625 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-30 02:19:51,625 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 136 flow [2023-08-30 02:19:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 02:19:51,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:51,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:19:51,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:51,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1811534857, now seen corresponding path program 1 times [2023-08-30 02:19:51,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230174526] [2023-08-30 02:19:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:51,657 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 02:19:51,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:51,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230174526] [2023-08-30 02:19:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230174526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:51,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:51,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:51,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839103376] [2023-08-30 02:19:51,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:51,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:51,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-30 02:19:51,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 02:19:51,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:51,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-30 02:19:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:51,808 INFO L130 PetriNetUnfolder]: 756/1233 cut-off events. [2023-08-30 02:19:51,808 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-30 02:19:51,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 1233 events. 756/1233 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5320 event pairs, 261 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2902. Up to 1007 conditions per place. [2023-08-30 02:19:51,815 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-30 02:19:51,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 309 flow [2023-08-30 02:19:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 02:19:51,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319567354965585 [2023-08-30 02:19:51,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 02:19:51,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 02:19:51,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:51,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 02:19:51,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:19:51,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:51,821 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 136 flow. Second operand 3 states and 541 transitions. [2023-08-30 02:19:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 309 flow [2023-08-30 02:19:51,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:51,825 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 138 flow [2023-08-30 02:19:51,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-30 02:19:51,825 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-30 02:19:51,826 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 138 flow [2023-08-30 02:19:51,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 02:19:51,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:51,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:51,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:19:51,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:51,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2007869220, now seen corresponding path program 1 times [2023-08-30 02:19:51,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:51,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405450039] [2023-08-30 02:19:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405450039] [2023-08-30 02:19:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405450039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:19:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35065158] [2023-08-30 02:19:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:19:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:52,101 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 02:19:52,146 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 02:19:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 02:19:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:19:52,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:52,386 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:19:52,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-30 02:19:52,415 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 02:19:52,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 02:19:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:19:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35065158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:19:52,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:19:52,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-30 02:19:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158280837] [2023-08-30 02:19:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:19:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 02:19:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 02:19:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-30 02:19:53,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-08-30 02:19:53,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 138 flow. Second operand has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 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 02:19:53,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:53,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-08-30 02:19:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:54,780 INFO L130 PetriNetUnfolder]: 1800/2943 cut-off events. [2023-08-30 02:19:54,781 INFO L131 PetriNetUnfolder]: For 587/587 co-relation queries the response was YES. [2023-08-30 02:19:54,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 2943 events. 1800/2943 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13825 event pairs, 193 based on Foata normal form. 44/2547 useless extension candidates. Maximal degree in co-relation 7014. Up to 1107 conditions per place. [2023-08-30 02:19:54,801 INFO L137 encePairwiseOnDemand]: 330/339 looper letters, 177 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2023-08-30 02:19:54,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 195 transitions, 905 flow [2023-08-30 02:19:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:19:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:19:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1949 transitions. [2023-08-30 02:19:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47910521140609635 [2023-08-30 02:19:54,807 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1949 transitions. [2023-08-30 02:19:54,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1949 transitions. [2023-08-30 02:19:54,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:54,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1949 transitions. [2023-08-30 02:19:54,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.41666666666666) internal successors, (1949), 12 states have internal predecessors, (1949), 0 states have call successors, (0), 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 02:19:54,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 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 02:19:54,818 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 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 02:19:54,818 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 138 flow. Second operand 12 states and 1949 transitions. [2023-08-30 02:19:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 195 transitions, 905 flow [2023-08-30 02:19:54,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 195 transitions, 902 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:54,824 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 270 flow [2023-08-30 02:19:54,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=270, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-30 02:19:54,825 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-30 02:19:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 270 flow [2023-08-30 02:19:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 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 02:19:54,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:54,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:54,836 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 02:19:55,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 02:19:55,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:55,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1422879367, now seen corresponding path program 1 times [2023-08-30 02:19:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:55,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441652890] [2023-08-30 02:19:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:55,110 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 02:19:55,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:55,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441652890] [2023-08-30 02:19:55,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441652890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:55,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:55,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075335158] [2023-08-30 02:19:55,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-30 02:19:55,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 02:19:55,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:55,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-30 02:19:55,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:55,251 INFO L130 PetriNetUnfolder]: 556/1039 cut-off events. [2023-08-30 02:19:55,251 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-30 02:19:55,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 1039 events. 556/1039 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4271 event pairs, 73 based on Foata normal form. 42/1019 useless extension candidates. Maximal degree in co-relation 2761. Up to 817 conditions per place. [2023-08-30 02:19:55,257 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 52 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2023-08-30 02:19:55,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 368 flow [2023-08-30 02:19:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-30 02:19:55,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103244837758112 [2023-08-30 02:19:55,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-30 02:19:55,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-30 02:19:55,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:55,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-30 02:19:55,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 02:19:55,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:55,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:55,272 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 270 flow. Second operand 3 states and 519 transitions. [2023-08-30 02:19:55,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 368 flow [2023-08-30 02:19:55,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 02:19:55,276 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 220 flow [2023-08-30 02:19:55,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-08-30 02:19:55,276 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-08-30 02:19:55,277 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 220 flow [2023-08-30 02:19:55,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 02:19:55,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:55,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:19:55,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:55,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1525694433, now seen corresponding path program 1 times [2023-08-30 02:19:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877418248] [2023-08-30 02:19:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:55,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:55,585 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 02:19:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877418248] [2023-08-30 02:19:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877418248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:55,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:55,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:19:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693956800] [2023-08-30 02:19:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:19:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:19:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:19:56,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 339 [2023-08-30 02:19:56,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 220 flow. Second operand has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 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 02:19:56,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:56,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 339 [2023-08-30 02:19:56,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:56,986 INFO L130 PetriNetUnfolder]: 728/1357 cut-off events. [2023-08-30 02:19:56,987 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-08-30 02:19:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1357 events. 728/1357 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6042 event pairs, 104 based on Foata normal form. 6/1321 useless extension candidates. Maximal degree in co-relation 3614. Up to 694 conditions per place. [2023-08-30 02:19:56,993 INFO L137 encePairwiseOnDemand]: 326/339 looper letters, 134 selfloop transitions, 17 changer transitions 0/152 dead transitions. [2023-08-30 02:19:56,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 846 flow [2023-08-30 02:19:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:19:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:19:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1854 transitions. [2023-08-30 02:19:56,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557522123893805 [2023-08-30 02:19:56,999 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1854 transitions. [2023-08-30 02:19:56,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1854 transitions. [2023-08-30 02:19:57,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1854 transitions. [2023-08-30 02:19:57,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.5) internal successors, (1854), 12 states have internal predecessors, (1854), 0 states have call successors, (0), 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 02:19:57,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 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 02:19:57,010 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 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 02:19:57,011 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 220 flow. Second operand 12 states and 1854 transitions. [2023-08-30 02:19:57,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 846 flow [2023-08-30 02:19:57,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:57,016 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 328 flow [2023-08-30 02:19:57,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=328, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-30 02:19:57,017 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2023-08-30 02:19:57,017 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 328 flow [2023-08-30 02:19:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 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 02:19:57,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:19:57,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:57,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1621935710, now seen corresponding path program 1 times [2023-08-30 02:19:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197770198] [2023-08-30 02:19:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,101 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 02:19:57,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197770198] [2023-08-30 02:19:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197770198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:57,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:57,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:19:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823531264] [2023-08-30 02:19:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:19:57,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:19:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:19:57,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-08-30 02:19:57,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 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 02:19:57,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:57,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-08-30 02:19:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:57,590 INFO L130 PetriNetUnfolder]: 878/1631 cut-off events. [2023-08-30 02:19:57,591 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2023-08-30 02:19:57,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1631 events. 878/1631 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7605 event pairs, 116 based on Foata normal form. 0/1613 useless extension candidates. Maximal degree in co-relation 4685. Up to 768 conditions per place. [2023-08-30 02:19:57,600 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 87 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-08-30 02:19:57,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 667 flow [2023-08-30 02:19:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:19:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:19:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1137 transitions. [2023-08-30 02:19:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47914032869785084 [2023-08-30 02:19:57,605 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1137 transitions. [2023-08-30 02:19:57,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1137 transitions. [2023-08-30 02:19:57,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1137 transitions. [2023-08-30 02:19:57,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 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 02:19:57,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 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 02:19:57,627 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 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 02:19:57,627 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 328 flow. Second operand 7 states and 1137 transitions. [2023-08-30 02:19:57,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 667 flow [2023-08-30 02:19:57,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 657 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 02:19:57,633 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 369 flow [2023-08-30 02:19:57,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=369, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-30 02:19:57,634 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-08-30 02:19:57,634 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 369 flow [2023-08-30 02:19:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 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 02:19:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:19:57,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:57,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash -365350266, now seen corresponding path program 1 times [2023-08-30 02:19:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13501184] [2023-08-30 02:19:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13501184] [2023-08-30 02:19:57,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13501184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:57,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:57,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749606860] [2023-08-30 02:19:57,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:57,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:57,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-30 02:19:57,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 02:19:57,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:57,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-30 02:19:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:57,967 INFO L130 PetriNetUnfolder]: 1115/2098 cut-off events. [2023-08-30 02:19:57,967 INFO L131 PetriNetUnfolder]: For 1660/1660 co-relation queries the response was YES. [2023-08-30 02:19:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 2098 events. 1115/2098 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10704 event pairs, 662 based on Foata normal form. 84/2146 useless extension candidates. Maximal degree in co-relation 6257. Up to 1548 conditions per place. [2023-08-30 02:19:57,980 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 107 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-30 02:19:57,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 852 flow [2023-08-30 02:19:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-30 02:19:57,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329400196656834 [2023-08-30 02:19:57,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-30 02:19:57,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-30 02:19:57,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:57,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-30 02:19:57,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 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 02:19:57,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:57,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 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 02:19:57,987 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 369 flow. Second operand 3 states and 542 transitions. [2023-08-30 02:19:57,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 852 flow [2023-08-30 02:19:57,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 840 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:57,996 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 383 flow [2023-08-30 02:19:57,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-08-30 02:19:57,997 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-08-30 02:19:57,997 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 383 flow [2023-08-30 02:19:57,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 02:19:57,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:57,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:57,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:19:57,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:57,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1608419276, now seen corresponding path program 1 times [2023-08-30 02:19:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:57,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443242760] [2023-08-30 02:19:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:58,631 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 02:19:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443242760] [2023-08-30 02:19:58,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443242760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:58,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:19:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016226009] [2023-08-30 02:19:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:19:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:19:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:19:59,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 339 [2023-08-30 02:19:59,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 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 02:19:59,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:59,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 339 [2023-08-30 02:19:59,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:00,983 INFO L130 PetriNetUnfolder]: 1418/2685 cut-off events. [2023-08-30 02:20:00,984 INFO L131 PetriNetUnfolder]: For 2255/2255 co-relation queries the response was YES. [2023-08-30 02:20:00,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2685 events. 1418/2685 cut-off events. For 2255/2255 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14483 event pairs, 338 based on Foata normal form. 12/2697 useless extension candidates. Maximal degree in co-relation 8417. Up to 1907 conditions per place. [2023-08-30 02:20:01,000 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 144 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2023-08-30 02:20:01,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 176 transitions, 1183 flow [2023-08-30 02:20:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 02:20:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 02:20:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2433 transitions. [2023-08-30 02:20:01,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39872173058013766 [2023-08-30 02:20:01,007 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2433 transitions. [2023-08-30 02:20:01,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2433 transitions. [2023-08-30 02:20:01,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:01,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2433 transitions. [2023-08-30 02:20:01,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 135.16666666666666) internal successors, (2433), 18 states have internal predecessors, (2433), 0 states have call successors, (0), 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 02:20:01,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 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 02:20:01,025 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 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 02:20:01,025 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 383 flow. Second operand 18 states and 2433 transitions. [2023-08-30 02:20:01,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 176 transitions, 1183 flow [2023-08-30 02:20:01,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 176 transitions, 1170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:01,036 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 628 flow [2023-08-30 02:20:01,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=628, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2023-08-30 02:20:01,037 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2023-08-30 02:20:01,037 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 628 flow [2023-08-30 02:20:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 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 02:20:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:01,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:20:01,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:01,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1883421570, now seen corresponding path program 2 times [2023-08-30 02:20:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917490939] [2023-08-30 02:20:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:01,769 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 02:20:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917490939] [2023-08-30 02:20:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917490939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:01,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408013302] [2023-08-30 02:20:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:03,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 339 [2023-08-30 02:20:03,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 628 flow. Second operand has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 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 02:20:03,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:03,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 339 [2023-08-30 02:20:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:04,688 INFO L130 PetriNetUnfolder]: 1711/3242 cut-off events. [2023-08-30 02:20:04,689 INFO L131 PetriNetUnfolder]: For 3166/3166 co-relation queries the response was YES. [2023-08-30 02:20:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10823 conditions, 3242 events. 1711/3242 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18363 event pairs, 449 based on Foata normal form. 12/3254 useless extension candidates. Maximal degree in co-relation 10789. Up to 1937 conditions per place. [2023-08-30 02:20:04,710 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 143 selfloop transitions, 40 changer transitions 0/184 dead transitions. [2023-08-30 02:20:04,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 1387 flow [2023-08-30 02:20:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:20:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:20:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1858 transitions. [2023-08-30 02:20:04,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914875684787189 [2023-08-30 02:20:04,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1858 transitions. [2023-08-30 02:20:04,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1858 transitions. [2023-08-30 02:20:04,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:04,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1858 transitions. [2023-08-30 02:20:04,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.71428571428572) internal successors, (1858), 14 states have internal predecessors, (1858), 0 states have call successors, (0), 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 02:20:04,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 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 02:20:04,729 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 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 02:20:04,730 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 628 flow. Second operand 14 states and 1858 transitions. [2023-08-30 02:20:04,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 1387 flow [2023-08-30 02:20:04,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 1362 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 02:20:04,747 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 851 flow [2023-08-30 02:20:04,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=851, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2023-08-30 02:20:04,748 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-08-30 02:20:04,748 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 851 flow [2023-08-30 02:20:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 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 02:20:04,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:04,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:04,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:20:04,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:04,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1987752546, now seen corresponding path program 3 times [2023-08-30 02:20:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225955329] [2023-08-30 02:20:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:05,465 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 02:20:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225955329] [2023-08-30 02:20:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225955329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869823114] [2023-08-30 02:20:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 339 [2023-08-30 02:20:06,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 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 02:20:06,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:06,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 339 [2023-08-30 02:20:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:07,951 INFO L130 PetriNetUnfolder]: 1699/3219 cut-off events. [2023-08-30 02:20:07,951 INFO L131 PetriNetUnfolder]: For 4161/4161 co-relation queries the response was YES. [2023-08-30 02:20:07,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11438 conditions, 3219 events. 1699/3219 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18158 event pairs, 385 based on Foata normal form. 12/3231 useless extension candidates. Maximal degree in co-relation 11397. Up to 1403 conditions per place. [2023-08-30 02:20:07,980 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 132 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2023-08-30 02:20:07,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 1532 flow [2023-08-30 02:20:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:20:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:20:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1996 transitions. [2023-08-30 02:20:07,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925270403146509 [2023-08-30 02:20:07,986 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1996 transitions. [2023-08-30 02:20:07,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1996 transitions. [2023-08-30 02:20:07,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:07,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1996 transitions. [2023-08-30 02:20:07,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.06666666666666) internal successors, (1996), 15 states have internal predecessors, (1996), 0 states have call successors, (0), 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 02:20:07,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 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 02:20:07,999 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 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 02:20:07,999 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 851 flow. Second operand 15 states and 1996 transitions. [2023-08-30 02:20:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 1532 flow [2023-08-30 02:20:08,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 1477 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 02:20:08,024 INFO L231 Difference]: Finished difference. Result has 135 places, 112 transitions, 1011 flow [2023-08-30 02:20:08,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1011, PETRI_PLACES=135, PETRI_TRANSITIONS=112} [2023-08-30 02:20:08,025 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-30 02:20:08,025 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 112 transitions, 1011 flow [2023-08-30 02:20:08,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 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 02:20:08,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:08,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 02:20:08,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:20:08,026 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:08,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash 863120243, now seen corresponding path program 1 times [2023-08-30 02:20:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790929393] [2023-08-30 02:20:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790929393] [2023-08-30 02:20:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790929393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503318288] [2023-08-30 02:20:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:08,113 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 02:20:08,143 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 02:20:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:08,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:20:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:08,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503318288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:08,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 02:20:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512397929] [2023-08-30 02:20:08,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:08,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:20:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:20:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:20:08,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-30 02:20:08,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 112 transitions, 1011 flow. Second operand has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 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 02:20:08,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:08,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-30 02:20:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:09,232 INFO L130 PetriNetUnfolder]: 2454/4656 cut-off events. [2023-08-30 02:20:09,233 INFO L131 PetriNetUnfolder]: For 6794/6794 co-relation queries the response was YES. [2023-08-30 02:20:09,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 4656 events. 2454/4656 cut-off events. For 6794/6794 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 25062 event pairs, 665 based on Foata normal form. 54/4710 useless extension candidates. Maximal degree in co-relation 16610. Up to 1655 conditions per place. [2023-08-30 02:20:09,268 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 239 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2023-08-30 02:20:09,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 280 transitions, 2427 flow [2023-08-30 02:20:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:20:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:20:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1907 transitions. [2023-08-30 02:20:09,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113971574148566 [2023-08-30 02:20:09,275 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1907 transitions. [2023-08-30 02:20:09,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1907 transitions. [2023-08-30 02:20:09,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:09,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1907 transitions. [2023-08-30 02:20:09,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.36363636363637) internal successors, (1907), 11 states have internal predecessors, (1907), 0 states have call successors, (0), 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 02:20:09,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 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 02:20:09,285 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 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 02:20:09,285 INFO L175 Difference]: Start difference. First operand has 135 places, 112 transitions, 1011 flow. Second operand 11 states and 1907 transitions. [2023-08-30 02:20:09,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 280 transitions, 2427 flow [2023-08-30 02:20:09,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 280 transitions, 2352 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-08-30 02:20:09,322 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 1282 flow [2023-08-30 02:20:09,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1282, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2023-08-30 02:20:09,322 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2023-08-30 02:20:09,322 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 1282 flow [2023-08-30 02:20:09,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 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 02:20:09,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:09,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:09,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 02:20:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:09,531 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:09,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1532241505, now seen corresponding path program 1 times [2023-08-30 02:20:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057982963] [2023-08-30 02:20:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:09,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057982963] [2023-08-30 02:20:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057982963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474009047] [2023-08-30 02:20:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:09,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:09,579 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 02:20:09,582 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 02:20:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:09,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:09,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:09,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474009047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:09,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:09,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:20:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652377467] [2023-08-30 02:20:09,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:09,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-30 02:20:09,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 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 02:20:09,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:09,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-30 02:20:09,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:11,084 INFO L130 PetriNetUnfolder]: 4799/9383 cut-off events. [2023-08-30 02:20:11,084 INFO L131 PetriNetUnfolder]: For 17714/17714 co-relation queries the response was YES. [2023-08-30 02:20:11,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34589 conditions, 9383 events. 4799/9383 cut-off events. For 17714/17714 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 62567 event pairs, 1181 based on Foata normal form. 1218/10601 useless extension candidates. Maximal degree in co-relation 34537. Up to 2316 conditions per place. [2023-08-30 02:20:11,157 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 455 selfloop transitions, 22 changer transitions 0/478 dead transitions. [2023-08-30 02:20:11,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 478 transitions, 5496 flow [2023-08-30 02:20:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:20:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:20:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-08-30 02:20:11,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349065880039331 [2023-08-30 02:20:11,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-08-30 02:20:11,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-08-30 02:20:11,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:11,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-08-30 02:20:11,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 0 states have call successors, (0), 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 02:20:11,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 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 02:20:11,170 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 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 02:20:11,170 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 1282 flow. Second operand 6 states and 1088 transitions. [2023-08-30 02:20:11,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 478 transitions, 5496 flow [2023-08-30 02:20:11,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 478 transitions, 5290 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:11,298 INFO L231 Difference]: Finished difference. Result has 150 places, 148 transitions, 1433 flow [2023-08-30 02:20:11,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1433, PETRI_PLACES=150, PETRI_TRANSITIONS=148} [2023-08-30 02:20:11,299 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2023-08-30 02:20:11,299 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 148 transitions, 1433 flow [2023-08-30 02:20:11,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 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 02:20:11,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:11,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:11,309 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 02:20:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:11,506 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:11,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1765816214, now seen corresponding path program 1 times [2023-08-30 02:20:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:11,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691593551] [2023-08-30 02:20:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:11,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:11,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691593551] [2023-08-30 02:20:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691593551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:11,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079620932] [2023-08-30 02:20:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:11,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:11,907 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 02:20:11,910 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 02:20:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 02:20:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:12,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:12,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:20:12,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-30 02:20:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:12,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079620932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:12,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:12,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-30 02:20:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678166929] [2023-08-30 02:20:12,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 02:20:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 02:20:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-30 02:20:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 339 [2023-08-30 02:20:14,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 148 transitions, 1433 flow. Second operand has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 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 02:20:14,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:14,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 339 [2023-08-30 02:20:14,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:17,933 INFO L130 PetriNetUnfolder]: 5668/11194 cut-off events. [2023-08-30 02:20:17,933 INFO L131 PetriNetUnfolder]: For 27513/27513 co-relation queries the response was YES. [2023-08-30 02:20:17,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43337 conditions, 11194 events. 5668/11194 cut-off events. For 27513/27513 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 75941 event pairs, 577 based on Foata normal form. 322/11516 useless extension candidates. Maximal degree in co-relation 43281. Up to 2611 conditions per place. [2023-08-30 02:20:18,002 INFO L137 encePairwiseOnDemand]: 324/339 looper letters, 319 selfloop transitions, 107 changer transitions 0/427 dead transitions. [2023-08-30 02:20:18,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 427 transitions, 3893 flow [2023-08-30 02:20:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 02:20:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 02:20:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4706 transitions. [2023-08-30 02:20:18,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338126843657817 [2023-08-30 02:20:18,011 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4706 transitions. [2023-08-30 02:20:18,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4706 transitions. [2023-08-30 02:20:18,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:18,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4706 transitions. [2023-08-30 02:20:18,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 147.0625) internal successors, (4706), 32 states have internal predecessors, (4706), 0 states have call successors, (0), 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 02:20:18,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 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 02:20:18,033 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 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 02:20:18,033 INFO L175 Difference]: Start difference. First operand has 150 places, 148 transitions, 1433 flow. Second operand 32 states and 4706 transitions. [2023-08-30 02:20:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 427 transitions, 3893 flow [2023-08-30 02:20:18,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 427 transitions, 3785 flow, removed 47 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:18,147 INFO L231 Difference]: Finished difference. Result has 197 places, 202 transitions, 2231 flow [2023-08-30 02:20:18,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2231, PETRI_PLACES=197, PETRI_TRANSITIONS=202} [2023-08-30 02:20:18,147 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2023-08-30 02:20:18,147 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 202 transitions, 2231 flow [2023-08-30 02:20:18,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 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 02:20:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:18,158 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 02:20:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:18,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:18,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1066183258, now seen corresponding path program 1 times [2023-08-30 02:20:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937699188] [2023-08-30 02:20:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:18,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:18,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937699188] [2023-08-30 02:20:18,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937699188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:18,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875877643] [2023-08-30 02:20:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:18,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:18,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:18,446 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 02:20:18,448 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 02:20:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:18,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:20:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:20:18,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875877643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 02:20:18,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-30 02:20:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160246086] [2023-08-30 02:20:18,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:20:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:20:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:20:18,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 339 [2023-08-30 02:20:18,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 202 transitions, 2231 flow. Second operand has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:18,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:18,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 339 [2023-08-30 02:20:18,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:20,701 INFO L130 PetriNetUnfolder]: 5972/11823 cut-off events. [2023-08-30 02:20:20,702 INFO L131 PetriNetUnfolder]: For 42852/42852 co-relation queries the response was YES. [2023-08-30 02:20:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50920 conditions, 11823 events. 5972/11823 cut-off events. For 42852/42852 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 80704 event pairs, 1888 based on Foata normal form. 64/11887 useless extension candidates. Maximal degree in co-relation 50846. Up to 5949 conditions per place. [2023-08-30 02:20:20,826 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 247 selfloop transitions, 45 changer transitions 0/293 dead transitions. [2023-08-30 02:20:20,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 3430 flow [2023-08-30 02:20:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:20:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:20:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1177 transitions. [2023-08-30 02:20:20,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49599662873999156 [2023-08-30 02:20:20,829 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1177 transitions. [2023-08-30 02:20:20,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1177 transitions. [2023-08-30 02:20:20,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:20,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1177 transitions. [2023-08-30 02:20:20,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 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 02:20:20,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 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 02:20:20,834 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 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 02:20:20,834 INFO L175 Difference]: Start difference. First operand has 197 places, 202 transitions, 2231 flow. Second operand 7 states and 1177 transitions. [2023-08-30 02:20:20,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 3430 flow [2023-08-30 02:20:21,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 293 transitions, 3203 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:21,068 INFO L231 Difference]: Finished difference. Result has 206 places, 210 transitions, 2332 flow [2023-08-30 02:20:21,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=206, PETRI_TRANSITIONS=210} [2023-08-30 02:20:21,069 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 157 predicate places. [2023-08-30 02:20:21,069 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 210 transitions, 2332 flow [2023-08-30 02:20:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:21,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:21,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:21,075 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 02:20:21,274 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,SelfDestructingSolverStorable21 [2023-08-30 02:20:21,274 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:21,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1306320960, now seen corresponding path program 1 times [2023-08-30 02:20:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128064145] [2023-08-30 02:20:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:20:21,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:20:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:20:21,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:20:21,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:20:21,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-30 02:20:21,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-30 02:20:21,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-30 02:20:21,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-30 02:20:21,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-30 02:20:21,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-30 02:20:21,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-30 02:20:21,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-30 02:20:21,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-30 02:20:21,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-30 02:20:21,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-30 02:20:21,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-30 02:20:21,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-30 02:20:21,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:20:21,383 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:21,388 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:20:21,388 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:20:21,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:20:21 BasicIcfg [2023-08-30 02:20:21,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:20:21,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:20:21,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:20:21,444 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:20:21,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:43" (3/4) ... [2023-08-30 02:20:21,449 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:20:21,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:20:21,450 INFO L158 Benchmark]: Toolchain (without parser) took 39156.31ms. Allocated memory was 67.1MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 37.2MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 656.6MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,450 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:20:21,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 607.38ms. Allocated memory was 67.1MB in the beginning and 92.3MB in the end (delta: 25.2MB). Free memory was 37.2MB in the beginning and 53.8MB in the end (delta: -16.7MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,450 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.38ms. Allocated memory is still 92.3MB. Free memory was 53.8MB in the beginning and 50.9MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,451 INFO L158 Benchmark]: Boogie Preprocessor took 28.02ms. Allocated memory is still 92.3MB. Free memory was 50.9MB in the beginning and 49.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,451 INFO L158 Benchmark]: RCFGBuilder took 513.11ms. Allocated memory is still 92.3MB. Free memory was 49.2MB in the beginning and 57.9MB in the end (delta: -8.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,451 INFO L158 Benchmark]: TraceAbstraction took 37945.67ms. Allocated memory was 92.3MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 57.3MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 650.7MB. Max. memory is 16.1GB. [2023-08-30 02:20:21,451 INFO L158 Benchmark]: Witness Printer took 5.35ms. Allocated memory is still 1.8GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:20:21,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 607.38ms. Allocated memory was 67.1MB in the beginning and 92.3MB in the end (delta: 25.2MB). Free memory was 37.2MB in the beginning and 53.8MB in the end (delta: -16.7MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.38ms. Allocated memory is still 92.3MB. Free memory was 53.8MB in the beginning and 50.9MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.02ms. Allocated memory is still 92.3MB. Free memory was 50.9MB in the beginning and 49.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 513.11ms. Allocated memory is still 92.3MB. Free memory was 49.2MB in the beginning and 57.9MB in the end (delta: -8.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * TraceAbstraction took 37945.67ms. Allocated memory was 92.3MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 57.3MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 650.7MB. Max. memory is 16.1GB. * Witness Printer took 5.35ms. Allocated memory is still 1.8GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 165 TotalNumberOfCompositions, 13763 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9423, independent: 9194, independent conditional: 0, independent unconditional: 9194, dependent: 229, dependent conditional: 0, dependent unconditional: 229, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4965, independent: 4910, independent conditional: 0, independent unconditional: 4910, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9423, independent: 4284, independent conditional: 0, independent unconditional: 4284, dependent: 174, dependent conditional: 0, dependent unconditional: 174, unknown: 4965, unknown conditional: 0, unknown unconditional: 4965] , Statistics on independence cache: Total cache size (in pairs): 283, Positive cache size: 262, Positive conditional cache size: 0, Positive unconditional cache size: 262, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=399, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.7s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6544 SdHoareTripleChecker+Valid, 12.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5705 mSDsluCounter, 11123 SdHoareTripleChecker+Invalid, 10.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10971 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26879 IncrementalHoareTripleChecker+Invalid, 27086 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 152 mSDtfsCounter, 26879 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2332occurred in iteration=22, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 453 NumberOfCodeBlocks, 453 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 4022 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1222 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 31 InterpolantComputations, 18 PerfectInterpolantSequences, 18/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-30 02:20:21,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/pthread/stack_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --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 02:20:23,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:20:23,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:20:23,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:20:23,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:20:23,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:20:23,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:20:23,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:20:23,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:20:23,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:20:23,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:20:23,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:20:23,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:20:23,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:20:23,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:20:23,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:20:23,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:20:23,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:20:23,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:20:23,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:20:23,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:20:23,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:20:23,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:20:23,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:20:23,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:20:23,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:20:23,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:20:23,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:20:23,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:20:23,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:20:23,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:20:23,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:20:23,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:20:23,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:20:23,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:20:23,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:20:23,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:20:23,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:20:23,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:20:23,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:20:23,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:20:23,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 02:20:23,659 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:20:23,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:20:23,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:20:23,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:20:23,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:20:23,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:20:23,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:20:23,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:20:23,662 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:20:23,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:20:23,663 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:20:23,663 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:20:23,664 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:20:23,665 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:20:23,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:20:23,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:20:23,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:20:23,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:23,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:20:23,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:20:23,667 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 02:20:23,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 02:20:23,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:20:23,667 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:20:23,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:20:23,668 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 02:20:23,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:20:23,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:20:23,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:20:24,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:20:24,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:20:24,014 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:20:24,015 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:20:24,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 02:20:25,260 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:20:25,541 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:20:25,545 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 02:20:25,567 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdc2172a/39b74db84eb847a586d3face5ae8cecb/FLAG4cecb141f [2023-08-30 02:20:25,582 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdc2172a/39b74db84eb847a586d3face5ae8cecb [2023-08-30 02:20:25,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:20:25,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:20:25,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:25,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:20:25,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:20:25,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:25" (1/1) ... [2023-08-30 02:20:25,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f1a004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:25, skipping insertion in model container [2023-08-30 02:20:25,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:25" (1/1) ... [2023-08-30 02:20:25,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:20:25,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:20:26,089 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 02:20:26,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:26,140 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:20:26,198 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 02:20:26,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:26,279 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:20:26,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26 WrapperNode [2023-08-30 02:20:26,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:26,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:26,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:20:26,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:20:26,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,328 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 152 [2023-08-30 02:20:26,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:26,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:20:26,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:20:26,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:20:26,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:20:26,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:20:26,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:20:26,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:20:26,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (1/1) ... [2023-08-30 02:20:26,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:26,397 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 02:20:26,410 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 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:20:26,430 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:20:26,430 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 02:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 02:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-30 02:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:20:26,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:20:26,432 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 02:20:26,567 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:20:26,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:20:27,012 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:20:27,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:20:27,020 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:20:27,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:27 BoogieIcfgContainer [2023-08-30 02:20:27,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:20:27,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:20:27,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:20:27,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:20:27,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:20:25" (1/3) ... [2023-08-30 02:20:27,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42391f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:27, skipping insertion in model container [2023-08-30 02:20:27,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:26" (2/3) ... [2023-08-30 02:20:27,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42391f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:27, skipping insertion in model container [2023-08-30 02:20:27,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:27" (3/3) ... [2023-08-30 02:20:27,028 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-30 02:20:27,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:20:27,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:20:27,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:20:27,161 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:20:27,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2023-08-30 02:20:27,275 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-30 02:20:27,276 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:27,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-30 02:20:27,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2023-08-30 02:20:27,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 340 flow [2023-08-30 02:20:27,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:20:27,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-30 02:20:27,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-30 02:20:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 164 transitions, 340 flow [2023-08-30 02:20:27,369 INFO L130 PetriNetUnfolder]: 10/164 cut-off events. [2023-08-30 02:20:27,369 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:27,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 420 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-30 02:20:27,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-30 02:20:35,245 INFO L134 LiptonReduction]: Checked pairs total: 12918 [2023-08-30 02:20:35,245 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 02:20:35,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:20:35,262 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;@7f82d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:20:35,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:20:35,265 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:20:35,265 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:20:35,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:35,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:20:35,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:35,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash 689, now seen corresponding path program 1 times [2023-08-30 02:20:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:35,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730945980] [2023-08-30 02:20:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:35,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:35,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 02:20:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-30 02:20:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:35,352 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 02:20:35,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:35,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730945980] [2023-08-30 02:20:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730945980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:35,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:35,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:20:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019016140] [2023-08-30 02:20:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:20:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:20:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:20:35,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 330 [2023-08-30 02:20:35,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 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 02:20:35,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:35,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 330 [2023-08-30 02:20:35,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:35,791 INFO L130 PetriNetUnfolder]: 1353/2144 cut-off events. [2023-08-30 02:20:35,792 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 02:20:35,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 2144 events. 1353/2144 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10238 event pairs, 1085 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 4016. Up to 2081 conditions per place. [2023-08-30 02:20:35,806 INFO L137 encePairwiseOnDemand]: 328/330 looper letters, 43 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-30 02:20:35,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 188 flow [2023-08-30 02:20:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:20:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:20:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 363 transitions. [2023-08-30 02:20:35,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-30 02:20:35,827 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 363 transitions. [2023-08-30 02:20:35,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 363 transitions. [2023-08-30 02:20:35,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:35,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 363 transitions. [2023-08-30 02:20:35,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 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 02:20:35,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 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 02:20:35,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 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 02:20:35,842 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 363 transitions. [2023-08-30 02:20:35,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 188 flow [2023-08-30 02:20:35,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:20:35,848 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 02:20:35,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 02:20:35,853 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:20:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 02:20:35,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 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 02:20:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:35,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:20:35,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:36,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:36,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash 680063, now seen corresponding path program 1 times [2023-08-30 02:20:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602604950] [2023-08-30 02:20:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:36,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:36,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 02:20:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:36,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:36,211 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 02:20:36,213 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 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-30 02:20:36,229 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 02:20:36,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:36,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:36,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602604950] [2023-08-30 02:20:36,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602604950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:36,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:36,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:36,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857956979] [2023-08-30 02:20:36,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:36,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-30 02:20:36,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 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 02:20:36,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:36,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-30 02:20:36,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:36,530 INFO L130 PetriNetUnfolder]: 1325/2090 cut-off events. [2023-08-30 02:20:36,530 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:36,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 2090 events. 1325/2090 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9855 event pairs, 1062 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4130. Up to 2026 conditions per place. [2023-08-30 02:20:36,540 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 02:20:36,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 172 flow [2023-08-30 02:20:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-30 02:20:36,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-08-30 02:20:36,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-30 02:20:36,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-30 02:20:36,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:36,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-30 02:20:36,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 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 02:20:36,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:36,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:36,548 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 493 transitions. [2023-08-30 02:20:36,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 172 flow [2023-08-30 02:20:36,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:36,550 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-30 02:20:36,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 02:20:36,551 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:20:36,551 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-30 02:20:36,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 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 02:20:36,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:36,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:20:36,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:36,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash 680062, now seen corresponding path program 1 times [2023-08-30 02:20:36,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:36,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375817350] [2023-08-30 02:20:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:36,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:36,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:36,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 02:20:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:36,904 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:20:36,905 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-30 02:20:36,926 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 02:20:36,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:36,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375817350] [2023-08-30 02:20:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375817350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:36,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:36,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:36,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813012094] [2023-08-30 02:20:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:36,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:37,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-30 02:20:37,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 02:20:37,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:37,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-30 02:20:37,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:37,209 INFO L130 PetriNetUnfolder]: 1297/2036 cut-off events. [2023-08-30 02:20:37,210 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:37,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 2036 events. 1297/2036 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9523 event pairs, 1039 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 4025. Up to 1973 conditions per place. [2023-08-30 02:20:37,219 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 02:20:37,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 168 flow [2023-08-30 02:20:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 02:20:37,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080808080808081 [2023-08-30 02:20:37,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 02:20:37,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 02:20:37,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:37,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 02:20:37,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 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 02:20:37,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:37,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:37,225 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 503 transitions. [2023-08-30 02:20:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 168 flow [2023-08-30 02:20:37,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:37,228 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-30 02:20:37,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-30 02:20:37,229 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:20:37,229 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-30 02:20:37,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 02:20:37,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:37,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:20:37,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:37,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:37,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 653554661, now seen corresponding path program 1 times [2023-08-30 02:20:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780048917] [2023-08-30 02:20:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:37,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:37,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 02:20:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 02:20:37,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:37,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-08-30 02:20:37,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 02:20:37,596 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 02:20:37,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:37,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:37,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780048917] [2023-08-30 02:20:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780048917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:37,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:37,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894314430] [2023-08-30 02:20:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:37,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:37,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-30 02:20:37,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 02:20:37,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:37,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-30 02:20:37,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:37,846 INFO L130 PetriNetUnfolder]: 948/1516 cut-off events. [2023-08-30 02:20:37,847 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:37,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 1516 events. 948/1516 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6799 event pairs, 752 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 3000. Up to 1468 conditions per place. [2023-08-30 02:20:37,853 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:20:37,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-30 02:20:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 02:20:37,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2023-08-30 02:20:37,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 02:20:37,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 02:20:37,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:37,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 02:20:37,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 02:20:37,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:37,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:37,860 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 501 transitions. [2023-08-30 02:20:37,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-30 02:20:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:37,862 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:20:37,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-30 02:20:37,863 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-30 02:20:37,864 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:20:37,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 02:20:37,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:37,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:20:37,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:38,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:38,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:38,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 653554660, now seen corresponding path program 1 times [2023-08-30 02:20:38,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:38,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121414531] [2023-08-30 02:20:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:38,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:38,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:38,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:38,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 02:20:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 02:20:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:38,173 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 02:20:38,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-08-30 02:20:38,187 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 02:20:38,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:38,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121414531] [2023-08-30 02:20:38,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121414531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:38,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:38,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664257774] [2023-08-30 02:20:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:38,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-30 02:20:38,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 02:20:38,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:38,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-30 02:20:38,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:38,382 INFO L130 PetriNetUnfolder]: 599/996 cut-off events. [2023-08-30 02:20:38,383 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:38,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 996 events. 599/996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4257 event pairs, 465 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 1975. Up to 963 conditions per place. [2023-08-30 02:20:38,387 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:20:38,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-30 02:20:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-30 02:20:38,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2023-08-30 02:20:38,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-30 02:20:38,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-30 02:20:38,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:38,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-30 02:20:38,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 02:20:38,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:38,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:38,394 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 488 transitions. [2023-08-30 02:20:38,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-30 02:20:38,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:38,396 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:20:38,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:20:38,399 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-30 02:20:38,399 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:20:38,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 02:20:38,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:38,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:38,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 02:20:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:38,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:38,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1215172952, now seen corresponding path program 1 times [2023-08-30 02:20:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:38,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812321716] [2023-08-30 02:20:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:38,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:38,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:38,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:38,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 02:20:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:38,695 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 02:20:38,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:38,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:38,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812321716] [2023-08-30 02:20:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812321716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:38,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:38,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238666831] [2023-08-30 02:20:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:38,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:38,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-30 02:20:38,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 02:20:38,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:38,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-30 02:20:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:38,928 INFO L130 PetriNetUnfolder]: 997/1662 cut-off events. [2023-08-30 02:20:38,928 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 02:20:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 1662 events. 997/1662 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7578 event pairs, 282 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 3292. Up to 974 conditions per place. [2023-08-30 02:20:38,935 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 63 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-30 02:20:38,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 285 flow [2023-08-30 02:20:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-30 02:20:38,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383838383838384 [2023-08-30 02:20:38,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-30 02:20:38,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-30 02:20:38,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:38,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-30 02:20:38,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 02:20:38,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:38,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:38,945 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 533 transitions. [2023-08-30 02:20:38,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 285 flow [2023-08-30 02:20:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:38,948 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-30 02:20:38,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-30 02:20:38,951 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:20:38,951 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-30 02:20:38,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 02:20:38,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:38,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:38,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:39,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:39,162 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:39,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174221, now seen corresponding path program 1 times [2023-08-30 02:20:39,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:39,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882279834] [2023-08-30 02:20:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:39,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:39,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:39,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 02:20:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 02:20:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:39,292 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 02:20:39,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-30 02:20:39,312 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:20:39,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:20:39,548 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 02:20:39,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:39,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882279834] [2023-08-30 02:20:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882279834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:39,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033086564] [2023-08-30 02:20:39,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:39,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:20:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:20:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:20:40,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-30 02:20:40,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 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 02:20:40,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:40,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-30 02:20:40,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:40,714 INFO L130 PetriNetUnfolder]: 1236/2073 cut-off events. [2023-08-30 02:20:40,714 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-30 02:20:40,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4425 conditions, 2073 events. 1236/2073 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9769 event pairs, 234 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 4420. Up to 1558 conditions per place. [2023-08-30 02:20:40,723 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 87 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2023-08-30 02:20:40,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 96 transitions, 435 flow [2023-08-30 02:20:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:20:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:20:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 852 transitions. [2023-08-30 02:20:40,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163636363636364 [2023-08-30 02:20:40,726 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 852 transitions. [2023-08-30 02:20:40,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 852 transitions. [2023-08-30 02:20:40,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:40,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 852 transitions. [2023-08-30 02:20:40,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 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 02:20:40,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 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 02:20:40,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 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 02:20:40,731 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 852 transitions. [2023-08-30 02:20:40,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 96 transitions, 435 flow [2023-08-30 02:20:40,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 96 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:40,734 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-30 02:20:40,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 02:20:40,735 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-30 02:20:40,735 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-30 02:20:40,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 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 02:20:40,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:40,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:40,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 02:20:40,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:40,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:40,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174222, now seen corresponding path program 1 times [2023-08-30 02:20:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269106020] [2023-08-30 02:20:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:40,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:40,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:40,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:40,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 02:20:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 02:20:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:41,061 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-30 02:20:41,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-08-30 02:20:41,184 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 02:20:41,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:41,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:41,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269106020] [2023-08-30 02:20:41,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269106020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:41,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:41,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:41,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318529236] [2023-08-30 02:20:41,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:41,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:20:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:20:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:20:41,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-30 02:20:41,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 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 02:20:41,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:41,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-30 02:20:41,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:42,048 INFO L130 PetriNetUnfolder]: 1316/2209 cut-off events. [2023-08-30 02:20:42,048 INFO L131 PetriNetUnfolder]: For 458/458 co-relation queries the response was YES. [2023-08-30 02:20:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 2209 events. 1316/2209 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10820 event pairs, 380 based on Foata normal form. 0/1953 useless extension candidates. Maximal degree in co-relation 4968. Up to 1354 conditions per place. [2023-08-30 02:20:42,058 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 82 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-08-30 02:20:42,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 93 transitions, 455 flow [2023-08-30 02:20:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:20:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:20:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-08-30 02:20:42,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084848484848485 [2023-08-30 02:20:42,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-08-30 02:20:42,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-08-30 02:20:42,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:42,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-08-30 02:20:42,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 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 02:20:42,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 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 02:20:42,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 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 02:20:42,066 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 839 transitions. [2023-08-30 02:20:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 93 transitions, 455 flow [2023-08-30 02:20:42,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 93 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:42,069 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-30 02:20:42,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-30 02:20:42,070 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-30 02:20:42,070 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-30 02:20:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 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 02:20:42,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:42,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:42,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 02:20:42,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:42,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:42,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -293150869, now seen corresponding path program 1 times [2023-08-30 02:20:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:42,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731606301] [2023-08-30 02:20:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:42,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:42,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:42,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 02:20:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:42,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:42,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:42,361 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 02:20:42,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:42,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:42,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731606301] [2023-08-30 02:20:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731606301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:42,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:42,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24336574] [2023-08-30 02:20:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:42,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-30 02:20:42,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 02:20:42,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:42,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-30 02:20:42,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:42,645 INFO L130 PetriNetUnfolder]: 1272/2113 cut-off events. [2023-08-30 02:20:42,646 INFO L131 PetriNetUnfolder]: For 766/766 co-relation queries the response was YES. [2023-08-30 02:20:42,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4937 conditions, 2113 events. 1272/2113 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9951 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4928. Up to 1371 conditions per place. [2023-08-30 02:20:42,662 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 02:20:42,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 361 flow [2023-08-30 02:20:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-30 02:20:42,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313131313131313 [2023-08-30 02:20:42,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-30 02:20:42,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-30 02:20:42,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:42,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-30 02:20:42,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 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 02:20:42,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:42,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:42,668 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 526 transitions. [2023-08-30 02:20:42,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 361 flow [2023-08-30 02:20:42,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 337 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 02:20:42,672 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 156 flow [2023-08-30 02:20:42,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-30 02:20:42,673 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-30 02:20:42,673 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 156 flow [2023-08-30 02:20:42,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 02:20:42,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:42,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:42,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:42,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:42,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:42,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1674813696, now seen corresponding path program 1 times [2023-08-30 02:20:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:42,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344397885] [2023-08-30 02:20:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:42,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:42,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:42,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 02:20:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:42,969 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 02:20:42,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:42,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344397885] [2023-08-30 02:20:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344397885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078650662] [2023-08-30 02:20:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:42,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-30 02:20:42,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 02:20:42,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:42,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-30 02:20:42,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:43,249 INFO L130 PetriNetUnfolder]: 1263/2135 cut-off events. [2023-08-30 02:20:43,249 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2023-08-30 02:20:43,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 2135 events. 1263/2135 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10508 event pairs, 893 based on Foata normal form. 62/1983 useless extension candidates. Maximal degree in co-relation 4998. Up to 1875 conditions per place. [2023-08-30 02:20:43,258 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-30 02:20:43,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 349 flow [2023-08-30 02:20:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-30 02:20:43,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262626262626262 [2023-08-30 02:20:43,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-30 02:20:43,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-30 02:20:43,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:43,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-30 02:20:43,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 02:20:43,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:43,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:43,264 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 156 flow. Second operand 3 states and 521 transitions. [2023-08-30 02:20:43,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 349 flow [2023-08-30 02:20:43,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:43,267 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-30 02:20:43,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-30 02:20:43,268 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-30 02:20:43,268 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-30 02:20:43,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 02:20:43,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:43,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:43,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:43,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:43,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:43,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1538942634, now seen corresponding path program 1 times [2023-08-30 02:20:43,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:43,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969064207] [2023-08-30 02:20:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:43,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:43,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:43,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 02:20:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:43,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:43,561 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 02:20:43,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:43,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969064207] [2023-08-30 02:20:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969064207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:43,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:43,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:43,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106689874] [2023-08-30 02:20:43,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:43,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:43,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:43,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-30 02:20:43,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 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 02:20:43,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:43,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-30 02:20:43,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:43,847 INFO L130 PetriNetUnfolder]: 1329/2262 cut-off events. [2023-08-30 02:20:43,848 INFO L131 PetriNetUnfolder]: For 883/883 co-relation queries the response was YES. [2023-08-30 02:20:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5518 conditions, 2262 events. 1329/2262 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11997 event pairs, 623 based on Foata normal form. 10/2040 useless extension candidates. Maximal degree in co-relation 5509. Up to 1915 conditions per place. [2023-08-30 02:20:43,856 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-30 02:20:43,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2023-08-30 02:20:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-30 02:20:43,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323232323232323 [2023-08-30 02:20:43,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-30 02:20:43,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-30 02:20:43,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:43,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-30 02:20:43,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 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 02:20:43,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:43,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:43,862 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 527 transitions. [2023-08-30 02:20:43,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2023-08-30 02:20:43,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:43,868 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 183 flow [2023-08-30 02:20:43,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-30 02:20:43,869 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 02:20:43,869 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 183 flow [2023-08-30 02:20:43,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 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 02:20:43,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:43,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:43,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:44,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:44,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:44,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash 583147771, now seen corresponding path program 1 times [2023-08-30 02:20:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:44,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736826176] [2023-08-30 02:20:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:44,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:44,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:44,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 02:20:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:44,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:44,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736826176] [2023-08-30 02:20:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736826176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:44,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:20:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 02:20:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157202034] [2023-08-30 02:20:44,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:20:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:20:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:20:44,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 330 [2023-08-30 02:20:44,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 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 02:20:44,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:44,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 330 [2023-08-30 02:20:44,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:45,384 INFO L130 PetriNetUnfolder]: 3502/5819 cut-off events. [2023-08-30 02:20:45,384 INFO L131 PetriNetUnfolder]: For 1898/1898 co-relation queries the response was YES. [2023-08-30 02:20:45,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14451 conditions, 5819 events. 3502/5819 cut-off events. For 1898/1898 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 32127 event pairs, 512 based on Foata normal form. 96/5291 useless extension candidates. Maximal degree in co-relation 14441. Up to 1238 conditions per place. [2023-08-30 02:20:45,409 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 258 selfloop transitions, 32 changer transitions 0/292 dead transitions. [2023-08-30 02:20:45,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 292 transitions, 1452 flow [2023-08-30 02:20:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:20:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:20:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2242 transitions. [2023-08-30 02:20:45,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226107226107226 [2023-08-30 02:20:45,415 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2242 transitions. [2023-08-30 02:20:45,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2242 transitions. [2023-08-30 02:20:45,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:45,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2242 transitions. [2023-08-30 02:20:45,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.46153846153845) internal successors, (2242), 13 states have internal predecessors, (2242), 0 states have call successors, (0), 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 02:20:45,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 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 02:20:45,427 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 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 02:20:45,427 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 183 flow. Second operand 13 states and 2242 transitions. [2023-08-30 02:20:45,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 292 transitions, 1452 flow [2023-08-30 02:20:45,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 292 transitions, 1448 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:45,440 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-30 02:20:45,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-30 02:20:45,440 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-30 02:20:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-30 02:20:45,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 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 02:20:45,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:45,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:45,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:45,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:45,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:45,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 583146502, now seen corresponding path program 1 times [2023-08-30 02:20:45,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:45,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864282850] [2023-08-30 02:20:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:45,653 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 02:20:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:45,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 02:20:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:45,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 02:20:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:46,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864282850] [2023-08-30 02:20:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864282850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:46,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:20:46,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 02:20:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081772648] [2023-08-30 02:20:46,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:20:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:20:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:20:49,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 330 [2023-08-30 02:20:49,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 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 02:20:49,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:49,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 330 [2023-08-30 02:20:49,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:52,688 INFO L130 PetriNetUnfolder]: 5099/8513 cut-off events. [2023-08-30 02:20:52,689 INFO L131 PetriNetUnfolder]: For 6582/6582 co-relation queries the response was YES. [2023-08-30 02:20:52,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22986 conditions, 8513 events. 5099/8513 cut-off events. For 6582/6582 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 50990 event pairs, 1445 based on Foata normal form. 84/7711 useless extension candidates. Maximal degree in co-relation 22973. Up to 5427 conditions per place. [2023-08-30 02:20:52,744 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 240 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2023-08-30 02:20:52,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 270 transitions, 1582 flow [2023-08-30 02:20:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:20:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:20:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2262 transitions. [2023-08-30 02:20:52,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896103896103896 [2023-08-30 02:20:52,752 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2262 transitions. [2023-08-30 02:20:52,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2262 transitions. [2023-08-30 02:20:52,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:52,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2262 transitions. [2023-08-30 02:20:52,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.57142857142858) internal successors, (2262), 14 states have internal predecessors, (2262), 0 states have call successors, (0), 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 02:20:52,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 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 02:20:52,794 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 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 02:20:52,794 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2262 transitions. [2023-08-30 02:20:52,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 270 transitions, 1582 flow [2023-08-30 02:20:52,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 270 transitions, 1522 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:52,823 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 658 flow [2023-08-30 02:20:52,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2023-08-30 02:20:52,825 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-08-30 02:20:52,825 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 658 flow [2023-08-30 02:20:52,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 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 02:20:52,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:52,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:52,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:53,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:53,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:53,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1940254627, now seen corresponding path program 1 times [2023-08-30 02:20:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060654028] [2023-08-30 02:20:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:53,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:53,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 02:20:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:53,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:53,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 9 [2023-08-30 02:20:53,140 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 02:20:53,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:53,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060654028] [2023-08-30 02:20:53,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060654028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:53,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:53,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099897140] [2023-08-30 02:20:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:53,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 330 [2023-08-30 02:20:53,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 658 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 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 02:20:53,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:53,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 330 [2023-08-30 02:20:53,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:53,422 INFO L130 PetriNetUnfolder]: 1277/2496 cut-off events. [2023-08-30 02:20:53,423 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-08-30 02:20:53,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6874 conditions, 2496 events. 1277/2496 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13334 event pairs, 235 based on Foata normal form. 102/2468 useless extension candidates. Maximal degree in co-relation 6855. Up to 1764 conditions per place. [2023-08-30 02:20:53,435 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-30 02:20:53,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 612 flow [2023-08-30 02:20:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-30 02:20:53,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-30 02:20:53,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-30 02:20:53,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-30 02:20:53,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:53,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-30 02:20:53,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 02:20:53,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:53,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:53,456 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 658 flow. Second operand 3 states and 506 transitions. [2023-08-30 02:20:53,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 612 flow [2023-08-30 02:20:53,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 588 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-30 02:20:53,469 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 432 flow [2023-08-30 02:20:53,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-30 02:20:53,470 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2023-08-30 02:20:53,471 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 432 flow [2023-08-30 02:20:53,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 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 02:20:53,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:53,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:53,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:53,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:53,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 649205973, now seen corresponding path program 1 times [2023-08-30 02:20:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683587655] [2023-08-30 02:20:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:53,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:53,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:53,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:53,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 02:20:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:20:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:53,838 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 02:20:53,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:53,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683587655] [2023-08-30 02:20:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683587655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:53,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:53,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:20:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174384285] [2023-08-30 02:20:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:53,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:54,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 330 [2023-08-30 02:20:54,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 432 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 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 02:20:54,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:54,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 330 [2023-08-30 02:20:54,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:54,774 INFO L130 PetriNetUnfolder]: 1601/3102 cut-off events. [2023-08-30 02:20:54,775 INFO L131 PetriNetUnfolder]: For 2095/2095 co-relation queries the response was YES. [2023-08-30 02:20:54,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8769 conditions, 3102 events. 1601/3102 cut-off events. For 2095/2095 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16912 event pairs, 301 based on Foata normal form. 0/3091 useless extension candidates. Maximal degree in co-relation 8750. Up to 1380 conditions per place. [2023-08-30 02:20:54,794 INFO L137 encePairwiseOnDemand]: 321/330 looper letters, 88 selfloop transitions, 28 changer transitions 0/124 dead transitions. [2023-08-30 02:20:54,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 885 flow [2023-08-30 02:20:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:20:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:20:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1400 transitions. [2023-08-30 02:20:54,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2023-08-30 02:20:54,799 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1400 transitions. [2023-08-30 02:20:54,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1400 transitions. [2023-08-30 02:20:54,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:54,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1400 transitions. [2023-08-30 02:20:54,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.55555555555554) internal successors, (1400), 9 states have internal predecessors, (1400), 0 states have call successors, (0), 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 02:20:54,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 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 02:20:54,807 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 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 02:20:54,807 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 432 flow. Second operand 9 states and 1400 transitions. [2023-08-30 02:20:54,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 885 flow [2023-08-30 02:20:54,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:54,820 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 594 flow [2023-08-30 02:20:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-08-30 02:20:54,820 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-30 02:20:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 594 flow [2023-08-30 02:20:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 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 02:20:54,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:54,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:54,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:55,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:55,031 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:55,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1490732010, now seen corresponding path program 1 times [2023-08-30 02:20:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399146595] [2023-08-30 02:20:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:55,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:55,033 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:55,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 02:20:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 02:20:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:55,434 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 02:20:55,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:55,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399146595] [2023-08-30 02:20:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399146595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:55,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:20:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443819440] [2023-08-30 02:20:55,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:20:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:20:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:20:56,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 330 [2023-08-30 02:20:56,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 594 flow. Second operand has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 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 02:20:56,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:56,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 330 [2023-08-30 02:20:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:58,493 INFO L130 PetriNetUnfolder]: 2210/4191 cut-off events. [2023-08-30 02:20:58,494 INFO L131 PetriNetUnfolder]: For 3063/3063 co-relation queries the response was YES. [2023-08-30 02:20:58,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12188 conditions, 4191 events. 2210/4191 cut-off events. For 3063/3063 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24174 event pairs, 639 based on Foata normal form. 38/4191 useless extension candidates. Maximal degree in co-relation 12166. Up to 2694 conditions per place. [2023-08-30 02:20:58,515 INFO L137 encePairwiseOnDemand]: 315/330 looper letters, 191 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2023-08-30 02:20:58,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 226 transitions, 1573 flow [2023-08-30 02:20:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:20:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:20:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2537 transitions. [2023-08-30 02:20:58,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222816399286986 [2023-08-30 02:20:58,528 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2537 transitions. [2023-08-30 02:20:58,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2537 transitions. [2023-08-30 02:20:58,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:58,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2537 transitions. [2023-08-30 02:20:58,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.23529411764707) internal successors, (2537), 17 states have internal predecessors, (2537), 0 states have call successors, (0), 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 02:20:58,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 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 02:20:58,549 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 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 02:20:58,549 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 594 flow. Second operand 17 states and 2537 transitions. [2023-08-30 02:20:58,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 226 transitions, 1573 flow [2023-08-30 02:20:58,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 226 transitions, 1508 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:20:58,565 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 891 flow [2023-08-30 02:20:58,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=891, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2023-08-30 02:20:58,567 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2023-08-30 02:20:58,567 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 891 flow [2023-08-30 02:20:58,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 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 02:20:58,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:58,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:58,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:58,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:58,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:58,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1867234959, now seen corresponding path program 1 times [2023-08-30 02:20:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:58,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247980439] [2023-08-30 02:20:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:58,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:58,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:58,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 02:20:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:58,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:58,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247980439] [2023-08-30 02:20:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247980439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:58,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130707708] [2023-08-30 02:20:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:58,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-30 02:20:58,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 891 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 02:20:58,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:58,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-30 02:20:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:59,466 INFO L130 PetriNetUnfolder]: 2391/4682 cut-off events. [2023-08-30 02:20:59,466 INFO L131 PetriNetUnfolder]: For 6746/6746 co-relation queries the response was YES. [2023-08-30 02:20:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15237 conditions, 4682 events. 2391/4682 cut-off events. For 6746/6746 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28821 event pairs, 1657 based on Foata normal form. 102/4716 useless extension candidates. Maximal degree in co-relation 15201. Up to 3747 conditions per place. [2023-08-30 02:20:59,488 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 154 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2023-08-30 02:20:59,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1590 flow [2023-08-30 02:20:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 02:20:59,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-30 02:20:59,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 02:20:59,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 02:20:59,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:59,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 02:20:59,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 02:20:59,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:59,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 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 02:20:59,500 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 891 flow. Second operand 3 states and 528 transitions. [2023-08-30 02:20:59,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1590 flow [2023-08-30 02:20:59,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 167 transitions, 1570 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:59,531 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 892 flow [2023-08-30 02:20:59,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=892, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2023-08-30 02:20:59,532 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2023-08-30 02:20:59,532 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 892 flow [2023-08-30 02:20:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 02:20:59,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:59,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:59,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:59,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:59,742 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:59,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1886484981, now seen corresponding path program 1 times [2023-08-30 02:20:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150230522] [2023-08-30 02:20:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:59,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:59,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:59,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 02:20:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 02:20:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:59,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-30 02:21:00,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:21:00,243 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 02:21:00,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:00,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150230522] [2023-08-30 02:21:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150230522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:00,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:00,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:21:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76448701] [2023-08-30 02:21:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:00,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:21:00,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:21:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:21:01,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-08-30 02:21:01,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 892 flow. Second operand has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 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 02:21:01,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:01,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-08-30 02:21:01,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:03,616 INFO L130 PetriNetUnfolder]: 3168/6068 cut-off events. [2023-08-30 02:21:03,616 INFO L131 PetriNetUnfolder]: For 8322/8322 co-relation queries the response was YES. [2023-08-30 02:21:03,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20622 conditions, 6068 events. 3168/6068 cut-off events. For 8322/8322 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 38271 event pairs, 912 based on Foata normal form. 12/6080 useless extension candidates. Maximal degree in co-relation 20584. Up to 4467 conditions per place. [2023-08-30 02:21:03,651 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 234 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2023-08-30 02:21:03,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 283 transitions, 2289 flow [2023-08-30 02:21:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 02:21:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 02:21:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3158 transitions. [2023-08-30 02:21:03,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160737812911726 [2023-08-30 02:21:03,660 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3158 transitions. [2023-08-30 02:21:03,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3158 transitions. [2023-08-30 02:21:03,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:03,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3158 transitions. [2023-08-30 02:21:03,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.30434782608697) internal successors, (3158), 23 states have internal predecessors, (3158), 0 states have call successors, (0), 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 02:21:03,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 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 02:21:03,684 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 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 02:21:03,684 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 892 flow. Second operand 23 states and 3158 transitions. [2023-08-30 02:21:03,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 283 transitions, 2289 flow [2023-08-30 02:21:03,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 283 transitions, 2276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:21:03,724 INFO L231 Difference]: Finished difference. Result has 152 places, 158 transitions, 1442 flow [2023-08-30 02:21:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1442, PETRI_PLACES=152, PETRI_TRANSITIONS=158} [2023-08-30 02:21:03,725 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2023-08-30 02:21:03,725 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 158 transitions, 1442 flow [2023-08-30 02:21:03,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 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 02:21:03,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:03,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:03,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:03,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:03,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:03,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -187980491, now seen corresponding path program 2 times [2023-08-30 02:21:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008677229] [2023-08-30 02:21:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:21:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:03,938 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:03,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 02:21:04,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 02:21:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 02:21:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:04,078 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-30 02:21:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-30 02:21:04,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-30 02:21:04,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 02:21:04,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:21:04,630 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 02:21:04,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:04,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008677229] [2023-08-30 02:21:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008677229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:04,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:21:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581339969] [2023-08-30 02:21:04,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:21:04,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:21:04,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:21:06,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-30 02:21:06,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 158 transitions, 1442 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 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 02:21:06,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:06,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-30 02:21:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:07,962 INFO L130 PetriNetUnfolder]: 3729/7146 cut-off events. [2023-08-30 02:21:07,963 INFO L131 PetriNetUnfolder]: For 12053/12053 co-relation queries the response was YES. [2023-08-30 02:21:07,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25514 conditions, 7146 events. 3729/7146 cut-off events. For 12053/12053 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46075 event pairs, 1227 based on Foata normal form. 6/7149 useless extension candidates. Maximal degree in co-relation 25460. Up to 5387 conditions per place. [2023-08-30 02:21:08,014 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 237 selfloop transitions, 43 changer transitions 0/282 dead transitions. [2023-08-30 02:21:08,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 282 transitions, 2708 flow [2023-08-30 02:21:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:21:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:21:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2041 transitions. [2023-08-30 02:21:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123232323232323 [2023-08-30 02:21:08,018 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2041 transitions. [2023-08-30 02:21:08,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2041 transitions. [2023-08-30 02:21:08,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:08,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2041 transitions. [2023-08-30 02:21:08,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.06666666666666) internal successors, (2041), 15 states have internal predecessors, (2041), 0 states have call successors, (0), 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 02:21:08,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 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 02:21:08,027 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 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 02:21:08,027 INFO L175 Difference]: Start difference. First operand has 152 places, 158 transitions, 1442 flow. Second operand 15 states and 2041 transitions. [2023-08-30 02:21:08,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 282 transitions, 2708 flow [2023-08-30 02:21:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 282 transitions, 2696 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:21:08,105 INFO L231 Difference]: Finished difference. Result has 175 places, 185 transitions, 1886 flow [2023-08-30 02:21:08,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1886, PETRI_PLACES=175, PETRI_TRANSITIONS=185} [2023-08-30 02:21:08,105 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2023-08-30 02:21:08,106 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 185 transitions, 1886 flow [2023-08-30 02:21:08,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 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 02:21:08,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:08,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:08,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:08,317 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:08,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1824818857, now seen corresponding path program 3 times [2023-08-30 02:21:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:08,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077274133] [2023-08-30 02:21:08,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:21:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:08,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:08,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:08,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 02:21:08,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 02:21:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 02:21:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:08,535 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-30 02:21:08,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-30 02:21:08,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-30 02:21:08,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 02:21:09,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:21:09,064 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 02:21:09,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:09,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077274133] [2023-08-30 02:21:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077274133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:21:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446526741] [2023-08-30 02:21:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:21:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:21:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:21:10,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-30 02:21:10,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 185 transitions, 1886 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 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 02:21:10,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:10,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-30 02:21:10,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:12,774 INFO L130 PetriNetUnfolder]: 3709/7106 cut-off events. [2023-08-30 02:21:12,774 INFO L131 PetriNetUnfolder]: For 13898/13898 co-relation queries the response was YES. [2023-08-30 02:21:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 7106 events. 3709/7106 cut-off events. For 13898/13898 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 45703 event pairs, 909 based on Foata normal form. 12/7112 useless extension candidates. Maximal degree in co-relation 26281. Up to 3383 conditions per place. [2023-08-30 02:21:12,828 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 193 selfloop transitions, 105 changer transitions 0/300 dead transitions. [2023-08-30 02:21:12,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 2977 flow [2023-08-30 02:21:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 02:21:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 02:21:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2944 transitions. [2023-08-30 02:21:12,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40550964187327826 [2023-08-30 02:21:12,833 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2944 transitions. [2023-08-30 02:21:12,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2944 transitions. [2023-08-30 02:21:12,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:12,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2944 transitions. [2023-08-30 02:21:12,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.8181818181818) internal successors, (2944), 22 states have internal predecessors, (2944), 0 states have call successors, (0), 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 02:21:12,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 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 02:21:12,847 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 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 02:21:12,847 INFO L175 Difference]: Start difference. First operand has 175 places, 185 transitions, 1886 flow. Second operand 22 states and 2944 transitions. [2023-08-30 02:21:12,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 2977 flow [2023-08-30 02:21:12,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 2958 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 02:21:12,938 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2223 flow [2023-08-30 02:21:12,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2223, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2023-08-30 02:21:12,939 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2023-08-30 02:21:12,939 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2223 flow [2023-08-30 02:21:12,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 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 02:21:12,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:12,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:12,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-30 02:21:13,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:13,150 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:13,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1957063094, now seen corresponding path program 1 times [2023-08-30 02:21:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:13,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684447328] [2023-08-30 02:21:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:13,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:13,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:13,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 02:21:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:21:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:13,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:13,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:13,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684447328] [2023-08-30 02:21:13,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684447328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:13,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:21:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 02:21:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681586737] [2023-08-30 02:21:13,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:21:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:21:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:21:13,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-30 02:21:13,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2223 flow. Second operand has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 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 02:21:13,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:13,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-30 02:21:13,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:15,590 INFO L130 PetriNetUnfolder]: 6549/13336 cut-off events. [2023-08-30 02:21:15,591 INFO L131 PetriNetUnfolder]: For 35357/35361 co-relation queries the response was YES. [2023-08-30 02:21:15,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51761 conditions, 13336 events. 6549/13336 cut-off events. For 35357/35361 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 105073 event pairs, 2123 based on Foata normal form. 1756/15091 useless extension candidates. Maximal degree in co-relation 51692. Up to 3645 conditions per place. [2023-08-30 02:21:15,738 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 552 selfloop transitions, 22 changer transitions 0/587 dead transitions. [2023-08-30 02:21:15,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 587 transitions, 7599 flow [2023-08-30 02:21:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:21:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:21:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1059 transitions. [2023-08-30 02:21:15,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348484848484848 [2023-08-30 02:21:15,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1059 transitions. [2023-08-30 02:21:15,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1059 transitions. [2023-08-30 02:21:15,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:15,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1059 transitions. [2023-08-30 02:21:15,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 0 states have call successors, (0), 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 02:21:15,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 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 02:21:15,746 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 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 02:21:15,746 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2223 flow. Second operand 6 states and 1059 transitions. [2023-08-30 02:21:15,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 587 transitions, 7599 flow [2023-08-30 02:21:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 587 transitions, 7069 flow, removed 58 selfloop flow, removed 15 redundant places. [2023-08-30 02:21:15,928 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2242 flow [2023-08-30 02:21:15,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2242, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2023-08-30 02:21:15,929 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2023-08-30 02:21:15,929 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2242 flow [2023-08-30 02:21:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 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 02:21:15,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:15,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:15,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:16,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:16,140 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:16,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1014945870, now seen corresponding path program 1 times [2023-08-30 02:21:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298435814] [2023-08-30 02:21:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:16,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:16,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 02:21:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:21:16,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:21:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:21:16,353 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-30 02:21:16,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:21:16,354 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-30 02:21:16,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-30 02:21:16,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-30 02:21:16,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-30 02:21:16,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-30 02:21:16,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-30 02:21:16,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-30 02:21:16,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-30 02:21:16,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:16,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:16,571 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:16,575 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:21:16,576 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:21:16,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:21:16 BasicIcfg [2023-08-30 02:21:16,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:21:16,640 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:21:16,640 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:21:16,640 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:21:16,641 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:27" (3/4) ... [2023-08-30 02:21:16,642 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:21:16,642 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:21:16,643 INFO L158 Benchmark]: Toolchain (without parser) took 51057.16ms. Allocated memory was 62.9MB in the beginning and 1.7GB in the end (delta: 1.7GB). Free memory was 39.4MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 490.8MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,643 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory was 26.6MB in the beginning and 26.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:21:16,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 692.73ms. Allocated memory was 62.9MB in the beginning and 81.8MB in the end (delta: 18.9MB). Free memory was 39.2MB in the beginning and 58.4MB in the end (delta: -19.1MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,643 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.44ms. Allocated memory is still 81.8MB. Free memory was 58.4MB in the beginning and 55.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,643 INFO L158 Benchmark]: Boogie Preprocessor took 29.52ms. Allocated memory is still 81.8MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,644 INFO L158 Benchmark]: RCFGBuilder took 662.26ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.3MB in the end (delta: 184.4kB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,644 INFO L158 Benchmark]: TraceAbstraction took 49616.30ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 52.8MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 482.4MB. Max. memory is 16.1GB. [2023-08-30 02:21:16,644 INFO L158 Benchmark]: Witness Printer took 2.24ms. Allocated memory is still 1.7GB. Free memory is still 1.2GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:21:16,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory was 26.6MB in the beginning and 26.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 692.73ms. Allocated memory was 62.9MB in the beginning and 81.8MB in the end (delta: 18.9MB). Free memory was 39.2MB in the beginning and 58.4MB in the end (delta: -19.1MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.44ms. Allocated memory is still 81.8MB. Free memory was 58.4MB in the beginning and 55.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.52ms. Allocated memory is still 81.8MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 662.26ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.3MB in the end (delta: 184.4kB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * TraceAbstraction took 49616.30ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 52.8MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 482.4MB. Max. memory is 16.1GB. * Witness Printer took 2.24ms. Allocated memory is still 1.7GB. Free memory is still 1.2GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.9s, 161 PlacesBefore, 49 PlacesAfterwards, 164 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 160 TotalNumberOfCompositions, 12918 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9264, independent: 9043, independent conditional: 0, independent unconditional: 9043, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4651, independent: 4594, independent conditional: 0, independent unconditional: 4594, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9264, independent: 4449, independent conditional: 0, independent unconditional: 4449, dependent: 164, dependent conditional: 0, dependent unconditional: 164, unknown: 4651, unknown conditional: 0, unknown unconditional: 4651] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 288, Positive conditional cache size: 0, Positive unconditional cache size: 288, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 261 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 49.4s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4887 SdHoareTripleChecker+Valid, 18.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4131 mSDsluCounter, 5878 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5574 mSDsCounter, 174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18909 IncrementalHoareTripleChecker+Invalid, 19083 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 174 mSolverCounterUnsat, 304 mSDtfsCounter, 18909 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2242occurred in iteration=21, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2421 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2046 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-30 02:21:16,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample