./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:20:28,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:20:28,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:20:28,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:20:28,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:20:28,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:20:28,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:20:28,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:20:28,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:20:28,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:20:28,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:20:28,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:20:28,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:20:28,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:20:28,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:20:28,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:20:28,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:20:28,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:20:28,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:20:28,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:20:28,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:20:28,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:20:28,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:20:28,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:20:28,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:20:28,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:20:28,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:20:28,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:20:28,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:20:28,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:20:28,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:20:28,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:20:28,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:20:28,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:20:28,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:20:28,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:20:28,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:20:28,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:20:28,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:20:28,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:20:28,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:20:28,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:20:28,245 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:20:28,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:20:28,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:20:28,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:20:28,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:20:28,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:20:28,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:20:28,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:20:28,248 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:20:28,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:20:28,249 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:20:28,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:20:28,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:20:28,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:20:28,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:20:28,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:20:28,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:20:28,251 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:20:28,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:20:28,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:20:28,251 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:20:28,251 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:20:28,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:20:28,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:20:28,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:20:28,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:28,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:20:28,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:20:28,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:20:28,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:20:28,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:20:28,253 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:20:28,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:20:28,254 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:20:28,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:20:28,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:20:28,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:20:28,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:20:28,576 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:20:28,576 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:20:28,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-31 22:20:29,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:20:29,908 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:20:29,909 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-31 22:20:29,920 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/326abfdec/af609912e2d04c1fad438c99227185f3/FLAGd9801bc18 [2023-08-31 22:20:29,935 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/326abfdec/af609912e2d04c1fad438c99227185f3 [2023-08-31 22:20:29,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:20:29,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:20:29,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:29,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:20:29,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:20:29,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:29" (1/1) ... [2023-08-31 22:20:29,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1bff0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:29, skipping insertion in model container [2023-08-31 22:20:29,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:29" (1/1) ... [2023-08-31 22:20:29,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:20:30,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:20:30,342 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-2.i[41520,41533] [2023-08-31 22:20:30,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:30,385 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:20:30,415 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-2.i[41520,41533] [2023-08-31 22:20:30,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:30,471 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:20:30,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30 WrapperNode [2023-08-31 22:20:30,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:30,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:30,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:20:30,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:20:30,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,524 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-08-31 22:20:30,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:30,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:20:30,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:20:30,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:20:30,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:20:30,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:20:30,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:20:30,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:20:30,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (1/1) ... [2023-08-31 22:20:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:30,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:30,614 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) [2023-08-31 22:20:30,628 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 [2023-08-31 22:20:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:20:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:20:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:20:30,655 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:20:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:20:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:20:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:20:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:20:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:20:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:20:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:20:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:20:30,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:20:30,657 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:20:30,834 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:20:30,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:20:31,163 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:20:31,171 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:20:31,171 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:20:31,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:31 BoogieIcfgContainer [2023-08-31 22:20:31,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:20:31,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:20:31,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:20:31,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:20:31,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:20:29" (1/3) ... [2023-08-31 22:20:31,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37454045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:31, skipping insertion in model container [2023-08-31 22:20:31,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:30" (2/3) ... [2023-08-31 22:20:31,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37454045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:31, skipping insertion in model container [2023-08-31 22:20:31,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:31" (3/3) ... [2023-08-31 22:20:31,181 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-31 22:20:31,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:20:31,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:20:31,195 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:20:31,307 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:20:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 178 transitions, 372 flow [2023-08-31 22:20:31,437 INFO L130 PetriNetUnfolder]: 10/176 cut-off events. [2023-08-31 22:20:31,437 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:31,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 10/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-31 22:20:31,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 178 transitions, 372 flow [2023-08-31 22:20:31,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 172 transitions, 356 flow [2023-08-31 22:20:31,455 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:20:31,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-31 22:20:31,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-31 22:20:31,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 356 flow [2023-08-31 22:20:31,529 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-31 22:20:31,530 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:31,534 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 443 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-31 22:20:31,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-31 22:20:35,911 INFO L134 LiptonReduction]: Checked pairs total: 13531 [2023-08-31 22:20:35,912 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-31 22:20:35,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:20:35,937 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;@53562c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:20:35,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:20:35,945 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-31 22:20:35,945 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:20:35,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:35,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:20:35,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:35,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 725, now seen corresponding path program 1 times [2023-08-31 22:20:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780245456] [2023-08-31 22:20:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780245456] [2023-08-31 22:20:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780245456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:36,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:20:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447861846] [2023-08-31 22:20:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:20:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:20:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:20:36,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 351 [2023-08-31 22:20:36,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:36,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 351 [2023-08-31 22:20:36,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:36,370 INFO L130 PetriNetUnfolder]: 1445/2244 cut-off events. [2023-08-31 22:20:36,371 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-31 22:20:36,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 2244 events. 1445/2244 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10421 event pairs, 1169 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4244. Up to 2225 conditions per place. [2023-08-31 22:20:36,385 INFO L137 encePairwiseOnDemand]: 349/351 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-31 22:20:36,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-31 22:20:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:20:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:20:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 380 transitions. [2023-08-31 22:20:36,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-08-31 22:20:36,405 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 380 transitions. [2023-08-31 22:20:36,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 380 transitions. [2023-08-31 22:20:36,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:36,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 380 transitions. [2023-08-31 22:20:36,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 190.0) internal successors, (380), 2 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,440 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,442 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 380 transitions. [2023-08-31 22:20:36,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-31 22:20:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:20:36,447 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-31 22:20:36,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:36,452 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:20:36,452 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-31 22:20:36,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:36,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:20:36,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:20:36,454 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)] === [2023-08-31 22:20:36,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 711496, now seen corresponding path program 1 times [2023-08-31 22:20:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:36,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183811339] [2023-08-31 22:20:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:36,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183811339] [2023-08-31 22:20:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183811339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:36,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:36,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174013431] [2023-08-31 22:20:36,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:36,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 351 [2023-08-31 22:20:36,692 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) [2023-08-31 22:20:36,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:36,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 351 [2023-08-31 22:20:36,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:36,915 INFO L130 PetriNetUnfolder]: 1416/2188 cut-off events. [2023-08-31 22:20:36,915 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 22:20:36,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4373 conditions, 2188 events. 1416/2188 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10060 event pairs, 1145 based on Foata normal form. 0/1217 useless extension candidates. Maximal degree in co-relation 4370. Up to 2168 conditions per place. [2023-08-31 22:20:36,926 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-31 22:20:36,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-31 22:20:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-31 22:20:36,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919278252611586 [2023-08-31 22:20:36,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-31 22:20:36,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-31 22:20:36,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:36,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-31 22:20:36,930 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) [2023-08-31 22:20:36,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:36,934 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-31 22:20:36,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-31 22:20:36,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:20:36,935 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-31 22:20:36,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:36,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:20:36,936 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-31 22:20:36,937 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) [2023-08-31 22:20:36,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:36,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:20:36,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:20:36,937 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)] === [2023-08-31 22:20:36,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 711497, now seen corresponding path program 1 times [2023-08-31 22:20:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:36,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600943453] [2023-08-31 22:20:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:36,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600943453] [2023-08-31 22:20:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600943453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:37,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:37,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684268351] [2023-08-31 22:20:37,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:37,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:37,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-31 22:20:37,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 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) [2023-08-31 22:20:37,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:37,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-31 22:20:37,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:37,248 INFO L130 PetriNetUnfolder]: 1387/2132 cut-off events. [2023-08-31 22:20:37,249 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 22:20:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2132 events. 1387/2132 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9708 event pairs, 1121 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 4261. Up to 2113 conditions per place. [2023-08-31 22:20:37,259 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-31 22:20:37,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-31 22:20:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-31 22:20:37,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014245014245015 [2023-08-31 22:20:37,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-31 22:20:37,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-31 22:20:37,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:37,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-31 22:20:37,264 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) [2023-08-31 22:20:37,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,267 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 528 transitions. [2023-08-31 22:20:37,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-31 22:20:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:37,269 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-31 22:20:37,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:37,269 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:20:37,270 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-31 22:20:37,270 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) [2023-08-31 22:20:37,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:37,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:20:37,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:20:37,271 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)] === [2023-08-31 22:20:37,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 683763408, now seen corresponding path program 1 times [2023-08-31 22:20:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523188710] [2023-08-31 22:20:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523188710] [2023-08-31 22:20:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523188710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207560894] [2023-08-31 22:20:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:37,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:37,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:37,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-31 22:20:37,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:37,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-31 22:20:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:37,521 INFO L130 PetriNetUnfolder]: 1013/1586 cut-off events. [2023-08-31 22:20:37,521 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 22:20:37,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1586 events. 1013/1586 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6956 event pairs, 811 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 3173. Up to 1571 conditions per place. [2023-08-31 22:20:37,533 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:20:37,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-31 22:20:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-31 22:20:37,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49952516619183285 [2023-08-31 22:20:37,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-31 22:20:37,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-31 22:20:37,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:37,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-31 22:20:37,538 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) [2023-08-31 22:20:37,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,544 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 526 transitions. [2023-08-31 22:20:37,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-31 22:20:37,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:37,546 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:20:37,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:37,548 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-31 22:20:37,548 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:20:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:37,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:20:37,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:20:37,549 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)] === [2023-08-31 22:20:37,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash 683763409, now seen corresponding path program 1 times [2023-08-31 22:20:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:37,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4916503] [2023-08-31 22:20:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:37,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4916503] [2023-08-31 22:20:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4916503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:37,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324514252] [2023-08-31 22:20:37,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:20:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:20:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:20:37,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 351 [2023-08-31 22:20:37,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:37,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 351 [2023-08-31 22:20:37,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:37,787 INFO L130 PetriNetUnfolder]: 639/1040 cut-off events. [2023-08-31 22:20:37,788 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 22:20:37,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 1040 events. 639/1040 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4363 event pairs, 501 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 2085. Up to 1029 conditions per place. [2023-08-31 22:20:37,793 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:20:37,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-31 22:20:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-31 22:20:37,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-31 22:20:37,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-31 22:20:37,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-31 22:20:37,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:37,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-31 22:20:37,797 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) [2023-08-31 22:20:37,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,799 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 501 transitions. [2023-08-31 22:20:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-31 22:20:37,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:37,801 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:20:37,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:37,802 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-31 22:20:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:20:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:37,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:20:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:20:37,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:37,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -279076636, now seen corresponding path program 1 times [2023-08-31 22:20:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318329867] [2023-08-31 22:20:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:37,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:37,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318329867] [2023-08-31 22:20:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318329867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093960647] [2023-08-31 22:20:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:37,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:37,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-31 22:20:37,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:37,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:37,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-31 22:20:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:38,009 INFO L130 PetriNetUnfolder]: 1075/1756 cut-off events. [2023-08-31 22:20:38,009 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-31 22:20:38,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1756 events. 1075/1756 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7943 event pairs, 312 based on Foata normal form. 0/1258 useless extension candidates. Maximal degree in co-relation 3516. Up to 1042 conditions per place. [2023-08-31 22:20:38,017 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-31 22:20:38,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-31 22:20:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-31 22:20:38,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2023-08-31 22:20:38,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-31 22:20:38,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-31 22:20:38,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:38,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-31 22:20:38,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,025 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 559 transitions. [2023-08-31 22:20:38,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-31 22:20:38,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:38,027 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-31 22:20:38,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:38,027 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:20:38,028 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-31 22:20:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:38,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:20:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:20:38,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:38,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -279078099, now seen corresponding path program 1 times [2023-08-31 22:20:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:38,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625069290] [2023-08-31 22:20:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:38,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625069290] [2023-08-31 22:20:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625069290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:38,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:38,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199472207] [2023-08-31 22:20:38,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:20:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:20:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:20:38,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-31 22:20:38,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:38,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-31 22:20:38,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:38,745 INFO L130 PetriNetUnfolder]: 1340/2209 cut-off events. [2023-08-31 22:20:38,746 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-08-31 22:20:38,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 2209 events. 1340/2209 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10364 event pairs, 277 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4742. Up to 1690 conditions per place. [2023-08-31 22:20:38,755 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-31 22:20:38,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-31 22:20:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:20:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:20:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 896 transitions. [2023-08-31 22:20:38,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105413105413106 [2023-08-31 22:20:38,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 896 transitions. [2023-08-31 22:20:38,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 896 transitions. [2023-08-31 22:20:38,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:38,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 896 transitions. [2023-08-31 22:20:38,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,764 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 896 transitions. [2023-08-31 22:20:38,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-31 22:20:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:38,767 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-31 22:20:38,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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} [2023-08-31 22:20:38,768 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-31 22:20:38,768 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-31 22:20:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:20:38,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:20:38,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:38,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -279078098, now seen corresponding path program 1 times [2023-08-31 22:20:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618843228] [2023-08-31 22:20:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618843228] [2023-08-31 22:20:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618843228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:38,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052462191] [2023-08-31 22:20:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:20:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:20:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:20:38,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 351 [2023-08-31 22:20:38,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:38,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:38,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 351 [2023-08-31 22:20:38,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:39,274 INFO L130 PetriNetUnfolder]: 1527/2496 cut-off events. [2023-08-31 22:20:39,275 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2023-08-31 22:20:39,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5712 conditions, 2496 events. 1527/2496 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12245 event pairs, 499 based on Foata normal form. 0/2144 useless extension candidates. Maximal degree in co-relation 5704. Up to 1668 conditions per place. [2023-08-31 22:20:39,292 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-31 22:20:39,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-31 22:20:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:20:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:20:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 879 transitions. [2023-08-31 22:20:39,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008547008547009 [2023-08-31 22:20:39,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 879 transitions. [2023-08-31 22:20:39,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 879 transitions. [2023-08-31 22:20:39,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:39,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 879 transitions. [2023-08-31 22:20:39,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,303 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 879 transitions. [2023-08-31 22:20:39,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-31 22:20:39,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:20:39,307 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-31 22:20:39,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-31 22:20:39,310 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-31 22:20:39,310 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-31 22:20:39,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:39,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:39,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:20:39,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:39,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1980734071, now seen corresponding path program 1 times [2023-08-31 22:20:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460906296] [2023-08-31 22:20:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:39,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:39,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460906296] [2023-08-31 22:20:39,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460906296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:39,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:39,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822667045] [2023-08-31 22:20:39,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:39,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 351 [2023-08-31 22:20:39,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 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) [2023-08-31 22:20:39,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:39,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 351 [2023-08-31 22:20:39,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:39,529 INFO L130 PetriNetUnfolder]: 1038/1713 cut-off events. [2023-08-31 22:20:39,529 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-31 22:20:39,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 1713 events. 1038/1713 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7487 event pairs, 470 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 4037. Up to 1417 conditions per place. [2023-08-31 22:20:39,538 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 58 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-31 22:20:39,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 312 flow [2023-08-31 22:20:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-31 22:20:39,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223171889838556 [2023-08-31 22:20:39,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-31 22:20:39,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-31 22:20:39,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:39,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-31 22:20:39,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,545 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 550 transitions. [2023-08-31 22:20:39,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 312 flow [2023-08-31 22:20:39,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 292 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-31 22:20:39,548 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 149 flow [2023-08-31 22:20:39,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-31 22:20:39,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-31 22:20:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 149 flow [2023-08-31 22:20:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-31 22:20:39,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:39,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:20:39,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:39,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2112403101, now seen corresponding path program 1 times [2023-08-31 22:20:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738317671] [2023-08-31 22:20:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:39,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:39,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738317671] [2023-08-31 22:20:39,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738317671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:39,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:39,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:39,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497858144] [2023-08-31 22:20:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:39,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-31 22:20:39,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 149 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) [2023-08-31 22:20:39,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:39,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-31 22:20:39,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:39,789 INFO L130 PetriNetUnfolder]: 1100/1809 cut-off events. [2023-08-31 22:20:39,789 INFO L131 PetriNetUnfolder]: For 440/440 co-relation queries the response was YES. [2023-08-31 22:20:39,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 1809 events. 1100/1809 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8048 event pairs, 782 based on Foata normal form. 60/1705 useless extension candidates. Maximal degree in co-relation 4237. Up to 1632 conditions per place. [2023-08-31 22:20:39,801 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 62 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-31 22:20:39,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 340 flow [2023-08-31 22:20:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-31 22:20:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194681861348528 [2023-08-31 22:20:39,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-31 22:20:39,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-31 22:20:39,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:39,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-31 22:20:39,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,808 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 149 flow. Second operand 3 states and 547 transitions. [2023-08-31 22:20:39,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 340 flow [2023-08-31 22:20:39,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:39,811 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 170 flow [2023-08-31 22:20:39,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-31 22:20:39,813 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-31 22:20:39,813 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 170 flow [2023-08-31 22:20:39,814 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) [2023-08-31 22:20:39,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:39,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:39,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:20:39,814 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)] === [2023-08-31 22:20:39,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash -473821575, now seen corresponding path program 1 times [2023-08-31 22:20:39,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:39,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257620473] [2023-08-31 22:20:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:39,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:39,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:39,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257620473] [2023-08-31 22:20:39,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257620473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:39,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:39,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776089114] [2023-08-31 22:20:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:39,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:39,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:39,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-31 22:20:39,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:39,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:39,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-31 22:20:39,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:40,045 INFO L130 PetriNetUnfolder]: 1152/1917 cut-off events. [2023-08-31 22:20:40,045 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-08-31 22:20:40,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1917 events. 1152/1917 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9386 event pairs, 495 based on Foata normal form. 12/1759 useless extension candidates. Maximal degree in co-relation 4697. Up to 1599 conditions per place. [2023-08-31 22:20:40,054 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 67 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-31 22:20:40,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 364 flow [2023-08-31 22:20:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-31 22:20:40,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251661918328585 [2023-08-31 22:20:40,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-31 22:20:40,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-31 22:20:40,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:40,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-31 22:20:40,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:40,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:40,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:40,061 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 170 flow. Second operand 3 states and 553 transitions. [2023-08-31 22:20:40,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 364 flow [2023-08-31 22:20:40,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:40,066 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 172 flow [2023-08-31 22:20:40,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-31 22:20:40,066 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-31 22:20:40,066 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 172 flow [2023-08-31 22:20:40,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:40,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:40,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:20:40,067 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:40,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1409017203, now seen corresponding path program 1 times [2023-08-31 22:20:40,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:40,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861941782] [2023-08-31 22:20:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:40,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861941782] [2023-08-31 22:20:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861941782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:20:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149052587] [2023-08-31 22:20:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:20:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:40,124 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) [2023-08-31 22:20:40,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:20:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:20:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:20:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:40,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:20:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149052587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:20:40,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:20:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-31 22:20:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213184510] [2023-08-31 22:20:40,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:20:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 22:20:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 22:20:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 22:20:40,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-31 22:20:40,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:40,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:40,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-31 22:20:40,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:41,084 INFO L130 PetriNetUnfolder]: 2435/3960 cut-off events. [2023-08-31 22:20:41,084 INFO L131 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2023-08-31 22:20:41,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 3960 events. 2435/3960 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19784 event pairs, 378 based on Foata normal form. 60/3634 useless extension candidates. Maximal degree in co-relation 9931. Up to 1190 conditions per place. [2023-08-31 22:20:41,101 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 202 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2023-08-31 22:20:41,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 225 transitions, 1115 flow [2023-08-31 22:20:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:20:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:20:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1818 transitions. [2023-08-31 22:20:41,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517948717948718 [2023-08-31 22:20:41,106 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1818 transitions. [2023-08-31 22:20:41,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1818 transitions. [2023-08-31 22:20:41,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:41,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1818 transitions. [2023-08-31 22:20:41,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.8) internal successors, (1818), 10 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:41,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:41,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:41,117 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 172 flow. Second operand 10 states and 1818 transitions. [2023-08-31 22:20:41,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 225 transitions, 1115 flow [2023-08-31 22:20:41,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 225 transitions, 1111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:41,126 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 339 flow [2023-08-31 22:20:41,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-08-31 22:20:41,127 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-31 22:20:41,127 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 339 flow [2023-08-31 22:20:41,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:41,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:41,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:41,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:20:41,341 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,SelfDestructingSolverStorable11 [2023-08-31 22:20:41,342 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:41,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1409018666, now seen corresponding path program 1 times [2023-08-31 22:20:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:41,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497529403] [2023-08-31 22:20:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497529403] [2023-08-31 22:20:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497529403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:20:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175135743] [2023-08-31 22:20:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:20:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:41,653 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) [2023-08-31 22:20:41,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 22:20:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 22:20:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:20:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:20:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:20:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:20:41,796 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 [2023-08-31 22:20:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:41,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:20:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:42,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175135743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:20:42,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:20:42,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-31 22:20:42,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639897808] [2023-08-31 22:20:42,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:20:42,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:20:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:20:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:20:43,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 351 [2023-08-31 22:20:43,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 339 flow. Second operand has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:43,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:43,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 351 [2023-08-31 22:20:43,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:45,484 INFO L130 PetriNetUnfolder]: 3743/6076 cut-off events. [2023-08-31 22:20:45,484 INFO L131 PetriNetUnfolder]: For 4774/4774 co-relation queries the response was YES. [2023-08-31 22:20:45,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 6076 events. 3743/6076 cut-off events. For 4774/4774 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 30295 event pairs, 949 based on Foata normal form. 84/5586 useless extension candidates. Maximal degree in co-relation 16608. Up to 3657 conditions per place. [2023-08-31 22:20:45,512 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 236 selfloop transitions, 27 changer transitions 0/263 dead transitions. [2023-08-31 22:20:45,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 263 transitions, 1483 flow [2023-08-31 22:20:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:20:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:20:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2375 transitions. [2023-08-31 22:20:45,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48331298331298334 [2023-08-31 22:20:45,519 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2375 transitions. [2023-08-31 22:20:45,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2375 transitions. [2023-08-31 22:20:45,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:45,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2375 transitions. [2023-08-31 22:20:45,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 169.64285714285714) internal successors, (2375), 14 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:45,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:45,531 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:45,531 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 339 flow. Second operand 14 states and 2375 transitions. [2023-08-31 22:20:45,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 263 transitions, 1483 flow [2023-08-31 22:20:45,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 263 transitions, 1451 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-31 22:20:45,549 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 605 flow [2023-08-31 22:20:45,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=605, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-08-31 22:20:45,550 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-31 22:20:45,550 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 605 flow [2023-08-31 22:20:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:45,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:45,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:45,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:20:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 22:20:45,769 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:45,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1918706977, now seen corresponding path program 1 times [2023-08-31 22:20:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:45,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205009661] [2023-08-31 22:20:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:45,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205009661] [2023-08-31 22:20:45,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205009661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:45,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:45,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:45,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209544427] [2023-08-31 22:20:45,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:45,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 351 [2023-08-31 22:20:45,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 605 flow. Second operand has 3 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) [2023-08-31 22:20:45,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:45,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 351 [2023-08-31 22:20:45,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:46,069 INFO L130 PetriNetUnfolder]: 852/1615 cut-off events. [2023-08-31 22:20:46,069 INFO L131 PetriNetUnfolder]: For 1937/1937 co-relation queries the response was YES. [2023-08-31 22:20:46,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 1615 events. 852/1615 cut-off events. For 1937/1937 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7069 event pairs, 117 based on Foata normal form. 94/1633 useless extension candidates. Maximal degree in co-relation 4523. Up to 1249 conditions per place. [2023-08-31 22:20:46,079 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2023-08-31 22:20:46,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 555 flow [2023-08-31 22:20:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-31 22:20:46,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2023-08-31 22:20:46,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-31 22:20:46,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-31 22:20:46,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:46,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-31 22:20:46,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,085 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 605 flow. Second operand 3 states and 531 transitions. [2023-08-31 22:20:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 555 flow [2023-08-31 22:20:46,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 529 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-31 22:20:46,092 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 383 flow [2023-08-31 22:20:46,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-31 22:20:46,092 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-08-31 22:20:46,093 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 383 flow [2023-08-31 22:20:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-31 22:20:46,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:46,093 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] [2023-08-31 22:20:46,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:20:46,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:46,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash -766914059, now seen corresponding path program 1 times [2023-08-31 22:20:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:46,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726786975] [2023-08-31 22:20:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726786975] [2023-08-31 22:20:46,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726786975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:46,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:46,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:20:46,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82770871] [2023-08-31 22:20:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:46,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:20:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:20:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:20:46,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 351 [2023-08-31 22:20:46,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 383 flow. Second operand has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:46,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 351 [2023-08-31 22:20:46,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:46,754 INFO L130 PetriNetUnfolder]: 933/1761 cut-off events. [2023-08-31 22:20:46,754 INFO L131 PetriNetUnfolder]: For 1216/1216 co-relation queries the response was YES. [2023-08-31 22:20:46,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1761 events. 933/1761 cut-off events. For 1216/1216 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7702 event pairs, 159 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 5004. Up to 951 conditions per place. [2023-08-31 22:20:46,762 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 92 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2023-08-31 22:20:46,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 741 flow [2023-08-31 22:20:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:20:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:20:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1319 transitions. [2023-08-31 22:20:46,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46972934472934474 [2023-08-31 22:20:46,766 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1319 transitions. [2023-08-31 22:20:46,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1319 transitions. [2023-08-31 22:20:46,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:46,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1319 transitions. [2023-08-31 22:20:46,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.875) internal successors, (1319), 8 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,773 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,773 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 383 flow. Second operand 8 states and 1319 transitions. [2023-08-31 22:20:46,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 741 flow [2023-08-31 22:20:46,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:46,779 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 429 flow [2023-08-31 22:20:46,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=429, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-08-31 22:20:46,779 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2023-08-31 22:20:46,779 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 429 flow [2023-08-31 22:20:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:46,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:46,780 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] [2023-08-31 22:20:46,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:20:46,780 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:46,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash -546386250, now seen corresponding path program 1 times [2023-08-31 22:20:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65315289] [2023-08-31 22:20:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65315289] [2023-08-31 22:20:47,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65315289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:47,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:47,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:20:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066202366] [2023-08-31 22:20:47,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:20:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:20:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:20:47,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 351 [2023-08-31 22:20:47,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:47,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:47,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 351 [2023-08-31 22:20:47,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:48,589 INFO L130 PetriNetUnfolder]: 1099/2019 cut-off events. [2023-08-31 22:20:48,590 INFO L131 PetriNetUnfolder]: For 1379/1379 co-relation queries the response was YES. [2023-08-31 22:20:48,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5845 conditions, 2019 events. 1099/2019 cut-off events. For 1379/1379 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9026 event pairs, 277 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 5819. Up to 1464 conditions per place. [2023-08-31 22:20:48,602 INFO L137 encePairwiseOnDemand]: 340/351 looper letters, 139 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2023-08-31 22:20:48,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 997 flow [2023-08-31 22:20:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:20:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:20:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1749 transitions. [2023-08-31 22:20:48,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2023-08-31 22:20:48,607 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1749 transitions. [2023-08-31 22:20:48,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1749 transitions. [2023-08-31 22:20:48,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:48,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1749 transitions. [2023-08-31 22:20:48,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,617 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,617 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 429 flow. Second operand 11 states and 1749 transitions. [2023-08-31 22:20:48,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 997 flow [2023-08-31 22:20:48,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 992 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:20:48,624 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 511 flow [2023-08-31 22:20:48,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=511, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-31 22:20:48,625 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2023-08-31 22:20:48,625 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 511 flow [2023-08-31 22:20:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:48,626 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] [2023-08-31 22:20:48,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:20:48,626 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)] === [2023-08-31 22:20:48,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1684855074, now seen corresponding path program 1 times [2023-08-31 22:20:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:48,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754229210] [2023-08-31 22:20:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:20:48,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:48,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754229210] [2023-08-31 22:20:48,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754229210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:48,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:48,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159842057] [2023-08-31 22:20:48,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:48,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-31 22:20:48,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 511 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:48,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-31 22:20:48,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:48,937 INFO L130 PetriNetUnfolder]: 1302/2468 cut-off events. [2023-08-31 22:20:48,938 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-08-31 22:20:48,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 2468 events. 1302/2468 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12525 event pairs, 812 based on Foata normal form. 72/2492 useless extension candidates. Maximal degree in co-relation 7409. Up to 1878 conditions per place. [2023-08-31 22:20:48,951 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 111 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-08-31 22:20:48,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1020 flow [2023-08-31 22:20:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-31 22:20:48,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261158594491928 [2023-08-31 22:20:48,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-31 22:20:48,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-31 22:20:48,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:48,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-31 22:20:48,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,957 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 511 flow. Second operand 3 states and 554 transitions. [2023-08-31 22:20:48,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1020 flow [2023-08-31 22:20:48,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 995 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 22:20:48,965 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 513 flow [2023-08-31 22:20:48,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2023-08-31 22:20:48,966 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2023-08-31 22:20:48,966 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 513 flow [2023-08-31 22:20:48,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:48,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:48,967 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] [2023-08-31 22:20:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:20:48,967 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:48,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash -154361138, now seen corresponding path program 1 times [2023-08-31 22:20:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125856102] [2023-08-31 22:20:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:49,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:49,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125856102] [2023-08-31 22:20:49,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125856102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:49,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:49,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:20:49,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228778954] [2023-08-31 22:20:49,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:49,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:20:49,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:20:49,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:20:50,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 351 [2023-08-31 22:20:50,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 513 flow. Second operand has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:50,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 351 [2023-08-31 22:20:50,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:51,764 INFO L130 PetriNetUnfolder]: 1633/3040 cut-off events. [2023-08-31 22:20:51,764 INFO L131 PetriNetUnfolder]: For 2940/2940 co-relation queries the response was YES. [2023-08-31 22:20:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9652 conditions, 3040 events. 1633/3040 cut-off events. For 2940/2940 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15503 event pairs, 462 based on Foata normal form. 12/3052 useless extension candidates. Maximal degree in co-relation 9621. Up to 2369 conditions per place. [2023-08-31 22:20:51,781 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 159 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2023-08-31 22:20:51,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1337 flow [2023-08-31 22:20:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:20:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:20:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2617 transitions. [2023-08-31 22:20:51,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142133586578031 [2023-08-31 22:20:51,789 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2617 transitions. [2023-08-31 22:20:51,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2617 transitions. [2023-08-31 22:20:51,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:51,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2617 transitions. [2023-08-31 22:20:51,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 145.38888888888889) internal successors, (2617), 18 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,802 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,802 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 513 flow. Second operand 18 states and 2617 transitions. [2023-08-31 22:20:51,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1337 flow [2023-08-31 22:20:51,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 1324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:51,813 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 762 flow [2023-08-31 22:20:51,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=762, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2023-08-31 22:20:51,814 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-31 22:20:51,814 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 762 flow [2023-08-31 22:20:51,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:51,815 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] [2023-08-31 22:20:51,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:20:51,815 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:51,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash -72213900, now seen corresponding path program 2 times [2023-08-31 22:20:51,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:51,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549882974] [2023-08-31 22:20:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:51,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549882974] [2023-08-31 22:20:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549882974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:52,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:20:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243489645] [2023-08-31 22:20:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:52,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:20:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:20:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:20:54,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-31 22:20:54,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 762 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:54,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:54,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-31 22:20:54,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:55,106 INFO L130 PetriNetUnfolder]: 1890/3518 cut-off events. [2023-08-31 22:20:55,107 INFO L131 PetriNetUnfolder]: For 4068/4068 co-relation queries the response was YES. [2023-08-31 22:20:55,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11964 conditions, 3518 events. 1890/3518 cut-off events. For 4068/4068 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 18684 event pairs, 547 based on Foata normal form. 12/3530 useless extension candidates. Maximal degree in co-relation 11924. Up to 2389 conditions per place. [2023-08-31 22:20:55,130 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 158 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2023-08-31 22:20:55,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 196 transitions, 1546 flow [2023-08-31 22:20:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:20:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:20:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2030 transitions. [2023-08-31 22:20:55,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2023-08-31 22:20:55,136 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2030 transitions. [2023-08-31 22:20:55,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2030 transitions. [2023-08-31 22:20:55,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:55,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2030 transitions. [2023-08-31 22:20:55,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.0) internal successors, (2030), 14 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:55,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:55,146 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:55,146 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 762 flow. Second operand 14 states and 2030 transitions. [2023-08-31 22:20:55,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 196 transitions, 1546 flow [2023-08-31 22:20:55,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 1539 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:55,166 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 990 flow [2023-08-31 22:20:55,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=990, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2023-08-31 22:20:55,167 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-31 22:20:55,167 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 990 flow [2023-08-31 22:20:55,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:55,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:55,168 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] [2023-08-31 22:20:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:20:55,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:55,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1285038460, now seen corresponding path program 3 times [2023-08-31 22:20:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029250713] [2023-08-31 22:20:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:55,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029250713] [2023-08-31 22:20:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029250713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:55,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:20:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232910438] [2023-08-31 22:20:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:55,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:20:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:20:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:20:57,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-31 22:20:57,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 990 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:57,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:57,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-31 22:20:57,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:58,339 INFO L130 PetriNetUnfolder]: 1878/3494 cut-off events. [2023-08-31 22:20:58,339 INFO L131 PetriNetUnfolder]: For 5394/5394 co-relation queries the response was YES. [2023-08-31 22:20:58,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 3494 events. 1878/3494 cut-off events. For 5394/5394 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 18482 event pairs, 499 based on Foata normal form. 12/3506 useless extension candidates. Maximal degree in co-relation 12617. Up to 1905 conditions per place. [2023-08-31 22:20:58,358 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 148 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2023-08-31 22:20:58,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 1704 flow [2023-08-31 22:20:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:20:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:20:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2165 transitions. [2023-08-31 22:20:58,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41120607787274455 [2023-08-31 22:20:58,363 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2165 transitions. [2023-08-31 22:20:58,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2165 transitions. [2023-08-31 22:20:58,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:58,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2165 transitions. [2023-08-31 22:20:58,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 144.33333333333334) internal successors, (2165), 15 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,375 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,376 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 990 flow. Second operand 15 states and 2165 transitions. [2023-08-31 22:20:58,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 1704 flow [2023-08-31 22:20:58,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 1655 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-31 22:20:58,402 INFO L231 Difference]: Finished difference. Result has 148 places, 122 transitions, 1147 flow [2023-08-31 22:20:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1147, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2023-08-31 22:20:58,403 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-31 22:20:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 1147 flow [2023-08-31 22:20:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:58,404 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] [2023-08-31 22:20:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:20:58,405 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)] === [2023-08-31 22:20:58,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -784371860, now seen corresponding path program 1 times [2023-08-31 22:20:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027757893] [2023-08-31 22:20:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:20:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027757893] [2023-08-31 22:20:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027757893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:20:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001272114] [2023-08-31 22:20:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:20:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:58,449 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) [2023-08-31 22:20:58,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:20:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:20:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:20:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:20:58,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:20:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:20:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001272114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:20:58,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:20:58,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:20:58,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987433648] [2023-08-31 22:20:58,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:20:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:20:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:20:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:20:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-31 22:20:58,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:58,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-31 22:20:58,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:59,484 INFO L130 PetriNetUnfolder]: 3617/6949 cut-off events. [2023-08-31 22:20:59,484 INFO L131 PetriNetUnfolder]: For 13751/13753 co-relation queries the response was YES. [2023-08-31 22:20:59,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26016 conditions, 6949 events. 3617/6949 cut-off events. For 13751/13753 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 45212 event pairs, 729 based on Foata normal form. 758/7706 useless extension candidates. Maximal degree in co-relation 25963. Up to 1593 conditions per place. [2023-08-31 22:20:59,529 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 375 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2023-08-31 22:20:59,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 403 transitions, 4640 flow [2023-08-31 22:20:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:20:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:20:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1111 transitions. [2023-08-31 22:20:59,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275403608736942 [2023-08-31 22:20:59,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1111 transitions. [2023-08-31 22:20:59,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1111 transitions. [2023-08-31 22:20:59,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:59,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1111 transitions. [2023-08-31 22:20:59,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,538 INFO L175 Difference]: Start difference. First operand has 148 places, 122 transitions, 1147 flow. Second operand 6 states and 1111 transitions. [2023-08-31 22:20:59,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 403 transitions, 4640 flow [2023-08-31 22:20:59,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 403 transitions, 4442 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-08-31 22:20:59,610 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 1291 flow [2023-08-31 22:20:59,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2023-08-31 22:20:59,611 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-31 22:20:59,611 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 1291 flow [2023-08-31 22:20:59,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:59,612 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] [2023-08-31 22:20:59,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 22:20:59,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:20:59,817 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:59,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash 586092581, now seen corresponding path program 1 times [2023-08-31 22:20:59,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:59,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874265757] [2023-08-31 22:20:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874265757] [2023-08-31 22:21:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874265757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:00,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349045891] [2023-08-31 22:21:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:00,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:00,112 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) [2023-08-31 22:21:00,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 22:21:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:00,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 22:21:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:00,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:00,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:21:00,771 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 [2023-08-31 22:21:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349045891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:00,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:00,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-31 22:21:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674271868] [2023-08-31 22:21:00,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 22:21:00,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 22:21:00,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-08-31 22:21:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-08-31 22:21:03,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 1291 flow. Second operand has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:03,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-08-31 22:21:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:07,559 INFO L130 PetriNetUnfolder]: 4889/9403 cut-off events. [2023-08-31 22:21:07,559 INFO L131 PetriNetUnfolder]: For 21134/21134 co-relation queries the response was YES. [2023-08-31 22:21:07,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 9403 events. 4889/9403 cut-off events. For 21134/21134 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 62479 event pairs, 747 based on Foata normal form. 260/9663 useless extension candidates. Maximal degree in co-relation 35954. Up to 1713 conditions per place. [2023-08-31 22:21:07,629 INFO L137 encePairwiseOnDemand]: 337/351 looper letters, 338 selfloop transitions, 103 changer transitions 0/441 dead transitions. [2023-08-31 22:21:07,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 441 transitions, 3951 flow [2023-08-31 22:21:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 22:21:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 22:21:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5941 transitions. [2023-08-31 22:21:07,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43399810066476735 [2023-08-31 22:21:07,636 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5941 transitions. [2023-08-31 22:21:07,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5941 transitions. [2023-08-31 22:21:07,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:07,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5941 transitions. [2023-08-31 22:21:07,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 152.33333333333334) internal successors, (5941), 39 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,658 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,658 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 1291 flow. Second operand 39 states and 5941 transitions. [2023-08-31 22:21:07,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 441 transitions, 3951 flow [2023-08-31 22:21:07,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 441 transitions, 3831 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:07,858 INFO L231 Difference]: Finished difference. Result has 199 places, 190 transitions, 2028 flow [2023-08-31 22:21:07,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2028, PETRI_PLACES=199, PETRI_TRANSITIONS=190} [2023-08-31 22:21:07,859 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-31 22:21:07,859 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 190 transitions, 2028 flow [2023-08-31 22:21:07,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:07,860 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] [2023-08-31 22:21:07,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:08,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:08,066 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:08,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1979566986, now seen corresponding path program 1 times [2023-08-31 22:21:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:08,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802613693] [2023-08-31 22:21:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:21:08,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:21:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:21:08,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:21:08,157 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:21:08,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-31 22:21:08,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-31 22:21:08,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-31 22:21:08,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-31 22:21:08,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-31 22:21:08,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-31 22:21:08,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-31 22:21:08,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-31 22:21:08,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-31 22:21:08,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-31 22:21:08,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-31 22:21:08,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:21:08,162 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] [2023-08-31 22:21:08,167 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:21:08,167 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:21:08,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:21:08 BasicIcfg [2023-08-31 22:21:08,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:21:08,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:21:08,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:21:08,224 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:21:08,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:31" (3/4) ... [2023-08-31 22:21:08,227 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:21:08,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:21:08,227 INFO L158 Benchmark]: Toolchain (without parser) took 38286.61ms. Allocated memory was 67.1MB in the beginning and 838.9MB in the end (delta: 771.8MB). Free memory was 42.9MB in the beginning and 546.6MB in the end (delta: -503.7MB). Peak memory consumption was 269.4MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,227 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:21:08,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 527.20ms. Allocated memory is still 67.1MB. Free memory was 42.7MB in the beginning and 30.1MB in the end (delta: 12.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,228 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.93ms. Allocated memory is still 67.1MB. Free memory was 30.1MB in the beginning and 45.5MB in the end (delta: -15.5MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,228 INFO L158 Benchmark]: Boogie Preprocessor took 45.54ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 43.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,228 INFO L158 Benchmark]: RCFGBuilder took 601.76ms. Allocated memory is still 67.1MB. Free memory was 43.5MB in the beginning and 44.2MB in the end (delta: -774.6kB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,229 INFO L158 Benchmark]: TraceAbstraction took 37048.47ms. Allocated memory was 67.1MB in the beginning and 838.9MB in the end (delta: 771.8MB). Free memory was 43.6MB in the beginning and 546.6MB in the end (delta: -503.0MB). Peak memory consumption was 269.3MB. Max. memory is 16.1GB. [2023-08-31 22:21:08,229 INFO L158 Benchmark]: Witness Printer took 3.03ms. Allocated memory is still 838.9MB. Free memory is still 546.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:21:08,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 527.20ms. Allocated memory is still 67.1MB. Free memory was 42.7MB in the beginning and 30.1MB in the end (delta: 12.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.93ms. Allocated memory is still 67.1MB. Free memory was 30.1MB in the beginning and 45.5MB in the end (delta: -15.5MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.54ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 43.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 601.76ms. Allocated memory is still 67.1MB. Free memory was 43.5MB in the beginning and 44.2MB in the end (delta: -774.6kB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 37048.47ms. Allocated memory was 67.1MB in the beginning and 838.9MB in the end (delta: 771.8MB). Free memory was 43.6MB in the beginning and 546.6MB in the end (delta: -503.0MB). Peak memory consumption was 269.3MB. Max. memory is 16.1GB. * Witness Printer took 3.03ms. Allocated memory is still 838.9MB. Free memory is still 546.6MB. 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: 4.4s, 169 PlacesBefore, 49 PlacesAfterwards, 172 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 45 TrivialSequentialCompositions, 101 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 173 TotalNumberOfCompositions, 13531 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10151, independent: 9934, independent conditional: 0, independent unconditional: 9934, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5010, independent: 4954, independent conditional: 0, independent unconditional: 4954, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10151, independent: 4980, independent conditional: 0, independent unconditional: 4980, dependent: 161, dependent conditional: 0, dependent unconditional: 161, unknown: 5010, unknown conditional: 0, unknown unconditional: 5010] , Statistics on independence cache: Total cache size (in pairs): 316, Positive cache size: 296, Positive conditional cache size: 0, Positive unconditional cache size: 296, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=1, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=1, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 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: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: 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: 1024]: 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: 941]: 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, 274 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: 36.8s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7077 SdHoareTripleChecker+Valid, 15.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6183 mSDsluCounter, 9683 SdHoareTripleChecker+Invalid, 12.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9388 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34362 IncrementalHoareTripleChecker+Invalid, 34540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 295 mSDtfsCounter, 34362 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=22, InterpolantAutomatonStates: 177, 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, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 393 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 22 NumberOfNonLiveVariables, 921 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 30 InterpolantComputations, 18 PerfectInterpolantSequences, 9/34 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 [2023-08-31 22:21:08,251 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-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:21:10,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:21:10,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:21:10,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:21:10,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:21:10,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:21:10,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:21:10,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:21:10,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:21:10,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:21:10,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:21:10,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:21:10,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:21:10,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:21:10,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:21:10,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:21:10,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:21:10,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:21:10,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:21:10,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:21:10,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:21:10,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:21:10,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:21:10,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:21:10,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:21:10,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:21:10,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:21:10,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:21:10,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:21:10,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:21:10,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:21:10,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:21:10,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:21:10,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:21:10,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:21:10,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:21:10,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:21:10,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:21:10,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:21:10,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:21:10,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:21:10,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-31 22:21:10,326 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:21:10,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:21:10,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:21:10,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:21:10,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:21:10,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:21:10,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:21:10,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:21:10,329 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:21:10,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:21:10,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:21:10,331 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:21:10,332 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:21:10,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:21:10,332 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:21:10,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-31 22:21:10,332 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-31 22:21:10,333 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:21:10,333 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:21:10,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:21:10,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:21:10,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:21:10,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:21:10,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:21:10,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:21:10,334 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-31 22:21:10,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-31 22:21:10,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:21:10,335 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:21:10,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:21:10,335 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-31 22:21:10,335 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:21:10,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:21:10,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:21:10,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:21:10,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:21:10,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:21:10,692 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:21:10,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-31 22:21:11,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:21:12,079 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:21:12,080 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-31 22:21:12,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78a1becf/b0009f6d5b534ef08338ce7079c9f4f7/FLAG8724dc029 [2023-08-31 22:21:12,118 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78a1becf/b0009f6d5b534ef08338ce7079c9f4f7 [2023-08-31 22:21:12,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:21:12,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:21:12,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:21:12,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:21:12,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:21:12,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eee52ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12, skipping insertion in model container [2023-08-31 22:21:12,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:21:12,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:21:12,580 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-2.i[41520,41533] [2023-08-31 22:21:12,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:21:12,628 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:21:12,686 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-2.i[41520,41533] [2023-08-31 22:21:12,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:21:12,773 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:21:12,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12 WrapperNode [2023-08-31 22:21:12,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:21:12,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:21:12,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:21:12,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:21:12,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,850 INFO L138 Inliner]: procedures = 281, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-31 22:21:12,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:21:12,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:21:12,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:21:12,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:21:12,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,886 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:21:12,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:21:12,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:21:12,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:21:12,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (1/1) ... [2023-08-31 22:21:12,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:21:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:12,933 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) [2023-08-31 22:21:12,953 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 [2023-08-31 22:21:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-31 22:21:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:21:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:21:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:21:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:21:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:21:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:21:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-31 22:21:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-31 22:21:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-31 22:21:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:21:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:21:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:21:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:21:12,982 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:21:13,114 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:21:13,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:21:13,448 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:21:13,455 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:21:13,457 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:21:13,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:13 BoogieIcfgContainer [2023-08-31 22:21:13,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:21:13,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:21:13,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:21:13,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:21:13,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:21:12" (1/3) ... [2023-08-31 22:21:13,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71906e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:21:13, skipping insertion in model container [2023-08-31 22:21:13,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:12" (2/3) ... [2023-08-31 22:21:13,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71906e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:21:13, skipping insertion in model container [2023-08-31 22:21:13,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:13" (3/3) ... [2023-08-31 22:21:13,468 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-31 22:21:13,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:21:13,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:21:13,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:21:13,615 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:21:13,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-31 22:21:13,716 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-31 22:21:13,717 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:21:13,723 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 423 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-31 22:21:13,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-31 22:21:13,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-31 22:21:13,735 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:21:13,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-31 22:21:13,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-31 22:21:13,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-31 22:21:13,789 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-31 22:21:13,790 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:21:13,791 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 422 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-31 22:21:13,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-31 22:21:22,410 INFO L134 LiptonReduction]: Checked pairs total: 12825 [2023-08-31 22:21:22,410 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-31 22:21:22,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:21:22,437 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;@1c012659, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:21:22,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:21:22,439 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:21:22,440 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:21:22,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:22,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:21:22,441 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)] === [2023-08-31 22:21:22,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash 707, now seen corresponding path program 1 times [2023-08-31 22:21:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746581317] [2023-08-31 22:21:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:22,457 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 [2023-08-31 22:21:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:22,461 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) [2023-08-31 22:21:22,474 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 [2023-08-31 22:21:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-31 22:21:22,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:22,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:22,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:22,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746581317] [2023-08-31 22:21:22,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746581317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:22,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:22,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:21:22,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106152812] [2023-08-31 22:21:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:21:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:21:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:21:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 342 [2023-08-31 22:21:22,611 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) [2023-08-31 22:21:22,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:22,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 342 [2023-08-31 22:21:22,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:23,018 INFO L130 PetriNetUnfolder]: 1445/2252 cut-off events. [2023-08-31 22:21:23,019 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:21:23,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2252 events. 1445/2252 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10541 event pairs, 1169 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 4252. Up to 2225 conditions per place. [2023-08-31 22:21:23,035 INFO L137 encePairwiseOnDemand]: 340/342 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-31 22:21:23,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-31 22:21:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:21:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:21:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-31 22:21:23,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-08-31 22:21:23,055 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-31 22:21:23,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-31 22:21:23,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:23,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-31 22:21:23,065 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) [2023-08-31 22:21:23,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,069 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,071 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-31 22:21:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-31 22:21:23,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:23,077 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-31 22:21:23,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:23,083 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:21:23,085 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-31 22:21:23,086 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) [2023-08-31 22:21:23,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:23,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:23,095 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 (2)] Ended with exit code 0 [2023-08-31 22:21:23,295 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 [2023-08-31 22:21:23,295 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)] === [2023-08-31 22:21:23,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash 694736, now seen corresponding path program 1 times [2023-08-31 22:21:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:23,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694129731] [2023-08-31 22:21:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:23,298 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 [2023-08-31 22:21:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:23,301 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) [2023-08-31 22:21:23,306 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 [2023-08-31 22:21:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:23,456 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:21:23,457 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 [2023-08-31 22:21:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:23,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:23,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694129731] [2023-08-31 22:21:23,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694129731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:23,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:23,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238912362] [2023-08-31 22:21:23,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:23,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-31 22:21:23,570 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) [2023-08-31 22:21:23,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:23,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-31 22:21:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:23,805 INFO L130 PetriNetUnfolder]: 1416/2196 cut-off events. [2023-08-31 22:21:23,805 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:23,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 2196 events. 1416/2196 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10203 event pairs, 1145 based on Foata normal form. 0/1225 useless extension candidates. Maximal degree in co-relation 4378. Up to 2168 conditions per place. [2023-08-31 22:21:23,826 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-31 22:21:23,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-31 22:21:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-31 22:21:23,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048732943469786 [2023-08-31 22:21:23,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-31 22:21:23,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-31 22:21:23,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:23,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-31 22:21:23,832 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) [2023-08-31 22:21:23,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,837 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-31 22:21:23,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-31 22:21:23,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:23,839 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-31 22:21:23,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:23,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:21:23,840 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-31 22:21:23,841 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) [2023-08-31 22:21:23,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:23,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:23,850 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 [2023-08-31 22:21:24,050 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 [2023-08-31 22:21:24,051 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)] === [2023-08-31 22:21:24,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 694735, now seen corresponding path program 1 times [2023-08-31 22:21:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740624952] [2023-08-31 22:21:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:24,052 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 [2023-08-31 22:21:24,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:24,053 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) [2023-08-31 22:21:24,056 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 [2023-08-31 22:21:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:24,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:24,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:24,131 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:21:24,132 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 [2023-08-31 22:21:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:24,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:24,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740624952] [2023-08-31 22:21:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740624952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:24,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:24,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707486929] [2023-08-31 22:21:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:24,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-31 22:21:24,210 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) [2023-08-31 22:21:24,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:24,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-31 22:21:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:24,415 INFO L130 PetriNetUnfolder]: 1387/2140 cut-off events. [2023-08-31 22:21:24,416 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2140 events. 1387/2140 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9853 event pairs, 1121 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 4269. Up to 2113 conditions per place. [2023-08-31 22:21:24,426 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-31 22:21:24,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-31 22:21:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-31 22:21:24,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-08-31 22:21:24,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-31 22:21:24,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-31 22:21:24,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:24,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-31 22:21:24,431 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) [2023-08-31 22:21:24,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:24,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:24,434 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-31 22:21:24,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-31 22:21:24,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:24,436 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-31 22:21:24,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:24,437 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:21:24,437 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-31 22:21:24,437 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) [2023-08-31 22:21:24,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:24,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:24,447 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 [2023-08-31 22:21:24,646 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 [2023-08-31 22:21:24,647 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)] === [2023-08-31 22:21:24,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 667655670, now seen corresponding path program 1 times [2023-08-31 22:21:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117324437] [2023-08-31 22:21:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:24,648 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 [2023-08-31 22:21:24,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:24,650 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) [2023-08-31 22:21:24,653 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 [2023-08-31 22:21:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:24,770 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-31 22:21:24,771 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 [2023-08-31 22:21:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:24,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:24,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117324437] [2023-08-31 22:21:24,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117324437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:24,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:24,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089010196] [2023-08-31 22:21:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:24,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:24,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:24,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-31 22:21:24,862 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) [2023-08-31 22:21:24,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:24,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-31 22:21:24,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:25,059 INFO L130 PetriNetUnfolder]: 1013/1592 cut-off events. [2023-08-31 22:21:25,060 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:25,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 1592 events. 1013/1592 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7048 event pairs, 811 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 3179. Up to 1571 conditions per place. [2023-08-31 22:21:25,067 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:21:25,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-31 22:21:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-31 22:21:25,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-31 22:21:25,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-31 22:21:25,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-31 22:21:25,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:25,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-31 22:21:25,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,074 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 502 transitions. [2023-08-31 22:21:25,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-31 22:21:25,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:25,075 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:25,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:25,076 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-31 22:21:25,076 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:25,077 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) [2023-08-31 22:21:25,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:25,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:25,091 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 [2023-08-31 22:21:25,286 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 [2023-08-31 22:21:25,286 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)] === [2023-08-31 22:21:25,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 667655669, now seen corresponding path program 1 times [2023-08-31 22:21:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:25,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606753750] [2023-08-31 22:21:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:25,287 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 [2023-08-31 22:21:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:25,288 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) [2023-08-31 22:21:25,291 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 [2023-08-31 22:21:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:21:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:25,395 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-31 22:21:25,396 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 11 [2023-08-31 22:21:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:25,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:25,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606753750] [2023-08-31 22:21:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606753750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:25,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:25,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126679484] [2023-08-31 22:21:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:25,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-31 22:21:25,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:25,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-31 22:21:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:25,679 INFO L130 PetriNetUnfolder]: 639/1044 cut-off events. [2023-08-31 22:21:25,680 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:25,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1044 events. 639/1044 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4435 event pairs, 501 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 2089. Up to 1029 conditions per place. [2023-08-31 22:21:25,684 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:21:25,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-31 22:21:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-31 22:21:25,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 22:21:25,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-31 22:21:25,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-31 22:21:25,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:25,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-31 22:21:25,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,692 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 513 transitions. [2023-08-31 22:21:25,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-31 22:21:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:25,693 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:25,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:25,694 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-31 22:21:25,694 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:25,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:25,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:25,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:25,705 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 (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:25,904 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 [2023-08-31 22:21:25,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:25,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash -778212206, now seen corresponding path program 1 times [2023-08-31 22:21:25,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:25,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474780966] [2023-08-31 22:21:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:25,906 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 [2023-08-31 22:21:25,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:25,907 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) [2023-08-31 22:21:25,907 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 [2023-08-31 22:21:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:26,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:26,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474780966] [2023-08-31 22:21:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474780966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:26,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:26,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:26,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122289001] [2023-08-31 22:21:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:26,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-31 22:21:26,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:26,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-31 22:21:26,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:26,245 INFO L130 PetriNetUnfolder]: 1075/1762 cut-off events. [2023-08-31 22:21:26,245 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-31 22:21:26,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1762 events. 1075/1762 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7985 event pairs, 312 based on Foata normal form. 0/1264 useless extension candidates. Maximal degree in co-relation 3522. Up to 1042 conditions per place. [2023-08-31 22:21:26,253 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-31 22:21:26,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-31 22:21:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-31 22:21:26,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331384015594542 [2023-08-31 22:21:26,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-31 22:21:26,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-31 22:21:26,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:26,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-31 22:21:26,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,259 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 547 transitions. [2023-08-31 22:21:26,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-31 22:21:26,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:26,261 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-31 22:21:26,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:26,261 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:21:26,262 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-31 22:21:26,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:26,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:26,275 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 [2023-08-31 22:21:26,472 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 [2023-08-31 22:21:26,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:26,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -778213138, now seen corresponding path program 1 times [2023-08-31 22:21:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199703938] [2023-08-31 22:21:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:26,473 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 [2023-08-31 22:21:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:26,474 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) [2023-08-31 22:21:26,476 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 [2023-08-31 22:21:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:21:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:26,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:26,602 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-31 22:21:26,603 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 [2023-08-31 22:21:26,621 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 22:21:26,621 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 [2023-08-31 22:21:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:26,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:26,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199703938] [2023-08-31 22:21:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199703938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:26,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004416132] [2023-08-31 22:21:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:27,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-31 22:21:27,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:27,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:27,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-31 22:21:27,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:27,953 INFO L130 PetriNetUnfolder]: 1340/2193 cut-off events. [2023-08-31 22:21:27,954 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-31 22:21:27,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 2193 events. 1340/2193 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10128 event pairs, 243 based on Foata normal form. 0/1695 useless extension candidates. Maximal degree in co-relation 4726. Up to 1690 conditions per place. [2023-08-31 22:21:27,964 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-31 22:21:27,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-31 22:21:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 876 transitions. [2023-08-31 22:21:27,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2023-08-31 22:21:27,967 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 876 transitions. [2023-08-31 22:21:27,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 876 transitions. [2023-08-31 22:21:27,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:27,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 876 transitions. [2023-08-31 22:21:27,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:27,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:27,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:27,973 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 876 transitions. [2023-08-31 22:21:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-31 22:21:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:27,977 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-31 22:21:27,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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} [2023-08-31 22:21:27,977 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-31 22:21:27,978 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-31 22:21:27,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:27,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:27,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:27,997 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 (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:28,187 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 [2023-08-31 22:21:28,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:28,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash -778213139, now seen corresponding path program 1 times [2023-08-31 22:21:28,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:28,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602102654] [2023-08-31 22:21:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:28,189 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 [2023-08-31 22:21:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:28,190 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) [2023-08-31 22:21:28,191 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 [2023-08-31 22:21:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:21:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:28,300 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-31 22:21:28,301 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 [2023-08-31 22:21:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:28,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:28,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602102654] [2023-08-31 22:21:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602102654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519627910] [2023-08-31 22:21:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:28,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-31 22:21:28,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:28,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:28,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-31 22:21:28,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:29,418 INFO L130 PetriNetUnfolder]: 1527/2494 cut-off events. [2023-08-31 22:21:29,418 INFO L131 PetriNetUnfolder]: For 531/531 co-relation queries the response was YES. [2023-08-31 22:21:29,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 2494 events. 1527/2494 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12159 event pairs, 505 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 5702. Up to 1668 conditions per place. [2023-08-31 22:21:29,432 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-31 22:21:29,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-31 22:21:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 864 transitions. [2023-08-31 22:21:29,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2023-08-31 22:21:29,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 864 transitions. [2023-08-31 22:21:29,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 864 transitions. [2023-08-31 22:21:29,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:29,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 864 transitions. [2023-08-31 22:21:29,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,441 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 864 transitions. [2023-08-31 22:21:29,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-31 22:21:29,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:29,444 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-31 22:21:29,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-31 22:21:29,445 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-31 22:21:29,445 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-31 22:21:29,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:29,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:29,455 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 (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:29,654 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 [2023-08-31 22:21:29,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:29,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -48791214, now seen corresponding path program 1 times [2023-08-31 22:21:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:29,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752106628] [2023-08-31 22:21:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:29,656 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 [2023-08-31 22:21:29,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:29,658 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) [2023-08-31 22:21:29,660 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 [2023-08-31 22:21:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:29,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:29,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752106628] [2023-08-31 22:21:29,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752106628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:29,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:29,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506801539] [2023-08-31 22:21:29,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:29,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-31 22:21:29,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:29,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-31 22:21:29,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:29,992 INFO L130 PetriNetUnfolder]: 1272/2115 cut-off events. [2023-08-31 22:21:29,993 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-31 22:21:29,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 2115 events. 1272/2115 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9962 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4955. Up to 1371 conditions per place. [2023-08-31 22:21:30,003 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-31 22:21:30,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 366 flow [2023-08-31 22:21:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-31 22:21:30,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243664717348928 [2023-08-31 22:21:30,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-31 22:21:30,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-31 22:21:30,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:30,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-31 22:21:30,008 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) [2023-08-31 22:21:30,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,010 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 538 transitions. [2023-08-31 22:21:30,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 366 flow [2023-08-31 22:21:30,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 341 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-31 22:21:30,014 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 159 flow [2023-08-31 22:21:30,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=159, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-31 22:21:30,015 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-31 22:21:30,015 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 159 flow [2023-08-31 22:21:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:30,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:30,024 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 [2023-08-31 22:21:30,224 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 [2023-08-31 22:21:30,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:30,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2144972854, now seen corresponding path program 1 times [2023-08-31 22:21:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518971653] [2023-08-31 22:21:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:30,225 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 [2023-08-31 22:21:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:30,226 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) [2023-08-31 22:21:30,229 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 [2023-08-31 22:21:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:30,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:30,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:30,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518971653] [2023-08-31 22:21:30,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518971653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:30,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:30,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:30,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270668702] [2023-08-31 22:21:30,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:30,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:30,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-31 22:21:30,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:30,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-31 22:21:30,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:30,596 INFO L130 PetriNetUnfolder]: 1367/2262 cut-off events. [2023-08-31 22:21:30,596 INFO L131 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2023-08-31 22:21:30,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5441 conditions, 2262 events. 1367/2262 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10896 event pairs, 972 based on Foata normal form. 66/2120 useless extension candidates. Maximal degree in co-relation 5432. Up to 2056 conditions per place. [2023-08-31 22:21:30,611 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 65 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-08-31 22:21:30,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 370 flow [2023-08-31 22:21:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-31 22:21:30,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214424951267057 [2023-08-31 22:21:30,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-31 22:21:30,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-31 22:21:30,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:30,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-31 22:21:30,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,618 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 159 flow. Second operand 3 states and 535 transitions. [2023-08-31 22:21:30,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 370 flow [2023-08-31 22:21:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:30,626 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 182 flow [2023-08-31 22:21:30,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=48, 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=182, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-31 22:21:30,628 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-31 22:21:30,628 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 182 flow [2023-08-31 22:21:30,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:30,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:30,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:30,637 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 [2023-08-31 22:21:30,837 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 [2023-08-31 22:21:30,838 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)] === [2023-08-31 22:21:30,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:30,838 INFO L85 PathProgramCache]: Analyzing trace with hash -642736256, now seen corresponding path program 1 times [2023-08-31 22:21:30,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:30,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820256780] [2023-08-31 22:21:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:30,838 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 [2023-08-31 22:21:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:30,839 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) [2023-08-31 22:21:30,840 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 [2023-08-31 22:21:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:30,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:30,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820256780] [2023-08-31 22:21:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820256780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:30,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:30,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35567166] [2023-08-31 22:21:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:30,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-31 22:21:30,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 182 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) [2023-08-31 22:21:30,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:30,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-31 22:21:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:31,218 INFO L130 PetriNetUnfolder]: 1452/2429 cut-off events. [2023-08-31 22:21:31,218 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2023-08-31 22:21:31,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 2429 events. 1452/2429 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12637 event pairs, 662 based on Foata normal form. 12/2167 useless extension candidates. Maximal degree in co-relation 6019. Up to 2082 conditions per place. [2023-08-31 22:21:31,228 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 71 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-31 22:21:31,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 397 flow [2023-08-31 22:21:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-31 22:21:31,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272904483430799 [2023-08-31 22:21:31,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-31 22:21:31,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-31 22:21:31,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:31,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-31 22:21:31,232 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) [2023-08-31 22:21:31,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:31,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:31,234 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 182 flow. Second operand 3 states and 541 transitions. [2023-08-31 22:21:31,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 397 flow [2023-08-31 22:21:31,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:31,239 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 184 flow [2023-08-31 22:21:31,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=172, 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=184, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-31 22:21:31,240 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-31 22:21:31,240 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 184 flow [2023-08-31 22:21:31,240 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) [2023-08-31 22:21:31,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:31,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:31,255 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 [2023-08-31 22:21:31,453 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 [2023-08-31 22:21:31,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:31,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1556724250, now seen corresponding path program 1 times [2023-08-31 22:21:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:31,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003660598] [2023-08-31 22:21:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:31,454 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 [2023-08-31 22:21:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:31,456 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) [2023-08-31 22:21:31,456 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 [2023-08-31 22:21:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:31,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:31,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003660598] [2023-08-31 22:21:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003660598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:31,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:21:31,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-31 22:21:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041066554] [2023-08-31 22:21:31,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 22:21:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 22:21:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:21:31,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 342 [2023-08-31 22:21:31,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:31,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:31,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 342 [2023-08-31 22:21:31,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:32,708 INFO L130 PetriNetUnfolder]: 3718/6089 cut-off events. [2023-08-31 22:21:32,709 INFO L131 PetriNetUnfolder]: For 2338/2338 co-relation queries the response was YES. [2023-08-31 22:21:32,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 6089 events. 3718/6089 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 32943 event pairs, 589 based on Foata normal form. 100/5439 useless extension candidates. Maximal degree in co-relation 15395. Up to 1333 conditions per place. [2023-08-31 22:21:32,737 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 282 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2023-08-31 22:21:32,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 314 transitions, 1586 flow [2023-08-31 22:21:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:21:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:21:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2306 transitions. [2023-08-31 22:21:32,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186684660368871 [2023-08-31 22:21:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2306 transitions. [2023-08-31 22:21:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2306 transitions. [2023-08-31 22:21:32,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2306 transitions. [2023-08-31 22:21:32,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.3846153846154) internal successors, (2306), 13 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:32,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:32,781 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:32,781 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 184 flow. Second operand 13 states and 2306 transitions. [2023-08-31 22:21:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 314 transitions, 1586 flow [2023-08-31 22:21:32,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 314 transitions, 1582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:32,790 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-31 22:21:32,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=182, 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} [2023-08-31 22:21:32,791 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-31 22:21:32,791 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-31 22:21:32,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:32,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:32,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:32,802 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 [2023-08-31 22:21:32,996 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 [2023-08-31 22:21:32,997 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:32,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1556725182, now seen corresponding path program 1 times [2023-08-31 22:21:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:32,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513381341] [2023-08-31 22:21:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:32,998 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 [2023-08-31 22:21:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:32,999 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) [2023-08-31 22:21:33,002 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 [2023-08-31 22:21:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:33,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 22:21:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:33,143 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:21:33,144 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 [2023-08-31 22:21:33,180 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-31 22:21:33,180 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 [2023-08-31 22:21:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:33,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513381341] [2023-08-31 22:21:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513381341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:33,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:21:33,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:21:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076226597] [2023-08-31 22:21:33,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:21:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:21:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:21:36,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 342 [2023-08-31 22:21:36,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:36,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:36,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 342 [2023-08-31 22:21:36,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:39,204 INFO L130 PetriNetUnfolder]: 5558/9121 cut-off events. [2023-08-31 22:21:39,205 INFO L131 PetriNetUnfolder]: For 7872/7872 co-relation queries the response was YES. [2023-08-31 22:21:39,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 9121 events. 5558/9121 cut-off events. For 7872/7872 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 53355 event pairs, 1601 based on Foata normal form. 90/8101 useless extension candidates. Maximal degree in co-relation 25143. Up to 5884 conditions per place. [2023-08-31 22:21:39,251 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 261 selfloop transitions, 27 changer transitions 0/288 dead transitions. [2023-08-31 22:21:39,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 288 transitions, 1701 flow [2023-08-31 22:21:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:21:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:21:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2329 transitions. [2023-08-31 22:21:39,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48642439431913115 [2023-08-31 22:21:39,259 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2329 transitions. [2023-08-31 22:21:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2329 transitions. [2023-08-31 22:21:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:39,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2329 transitions. [2023-08-31 22:21:39,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.35714285714286) internal successors, (2329), 14 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,273 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,273 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2329 transitions. [2023-08-31 22:21:39,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 288 transitions, 1701 flow [2023-08-31 22:21:39,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 288 transitions, 1641 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:39,300 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 671 flow [2023-08-31 22:21:39,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=671, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2023-08-31 22:21:39,301 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2023-08-31 22:21:39,302 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 671 flow [2023-08-31 22:21:39,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:39,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:39,319 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 [2023-08-31 22:21:39,519 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 [2023-08-31 22:21:39,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:39,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 921987, now seen corresponding path program 1 times [2023-08-31 22:21:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839577713] [2023-08-31 22:21:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:39,520 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 [2023-08-31 22:21:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:39,522 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) [2023-08-31 22:21:39,523 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 [2023-08-31 22:21:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:39,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:39,602 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 [2023-08-31 22:21:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:39,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:39,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839577713] [2023-08-31 22:21:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839577713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:39,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964889930] [2023-08-31 22:21:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:39,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-31 22:21:39,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 671 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) [2023-08-31 22:21:39,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:39,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-31 22:21:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:39,893 INFO L130 PetriNetUnfolder]: 1329/2548 cut-off events. [2023-08-31 22:21:39,893 INFO L131 PetriNetUnfolder]: For 3151/3151 co-relation queries the response was YES. [2023-08-31 22:21:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 2548 events. 1329/2548 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13382 event pairs, 235 based on Foata normal form. 120/2490 useless extension candidates. Maximal degree in co-relation 7207. Up to 1916 conditions per place. [2023-08-31 22:21:39,905 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 67 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-08-31 22:21:39,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 603 flow [2023-08-31 22:21:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-31 22:21:39,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058479532163743 [2023-08-31 22:21:39,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-31 22:21:39,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-31 22:21:39,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:39,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-31 22:21:39,910 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) [2023-08-31 22:21:39,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,912 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 671 flow. Second operand 3 states and 519 transitions. [2023-08-31 22:21:39,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 603 flow [2023-08-31 22:21:39,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 583 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-31 22:21:39,921 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 425 flow [2023-08-31 22:21:39,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-08-31 22:21:39,922 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-08-31 22:21:39,922 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 425 flow [2023-08-31 22:21:39,923 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) [2023-08-31 22:21:39,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:39,923 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] [2023-08-31 22:21:39,933 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 [2023-08-31 22:21:40,132 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 [2023-08-31 22:21:40,133 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:40,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1594065870, now seen corresponding path program 1 times [2023-08-31 22:21:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:40,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102717989] [2023-08-31 22:21:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:40,134 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 [2023-08-31 22:21:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:40,135 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) [2023-08-31 22:21:40,136 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 [2023-08-31 22:21:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:21:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:40,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:40,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:40,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102717989] [2023-08-31 22:21:40,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102717989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:40,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:40,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:21:40,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769754335] [2023-08-31 22:21:40,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:40,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:40,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:40,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 342 [2023-08-31 22:21:40,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:40,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 342 [2023-08-31 22:21:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:41,141 INFO L130 PetriNetUnfolder]: 1681/3192 cut-off events. [2023-08-31 22:21:41,141 INFO L131 PetriNetUnfolder]: For 2562/2562 co-relation queries the response was YES. [2023-08-31 22:21:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 3192 events. 1681/3192 cut-off events. For 2562/2562 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17039 event pairs, 409 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 9192. Up to 1584 conditions per place. [2023-08-31 22:21:41,156 INFO L137 encePairwiseOnDemand]: 334/342 looper letters, 105 selfloop transitions, 10 changer transitions 0/121 dead transitions. [2023-08-31 22:21:41,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 871 flow [2023-08-31 22:21:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:21:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:21:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2023-08-31 22:21:41,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47039473684210525 [2023-08-31 22:21:41,165 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2023-08-31 22:21:41,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2023-08-31 22:21:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2023-08-31 22:21:41,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,172 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,173 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 425 flow. Second operand 8 states and 1287 transitions. [2023-08-31 22:21:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 871 flow [2023-08-31 22:21:41,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 857 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:41,183 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 482 flow [2023-08-31 22:21:41,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-31 22:21:41,184 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2023-08-31 22:21:41,184 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 482 flow [2023-08-31 22:21:41,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:41,184 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] [2023-08-31 22:21:41,197 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 [2023-08-31 22:21:41,395 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 [2023-08-31 22:21:41,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:41,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1513666805, now seen corresponding path program 1 times [2023-08-31 22:21:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:41,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657748980] [2023-08-31 22:21:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:41,396 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 [2023-08-31 22:21:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:41,397 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) [2023-08-31 22:21:41,400 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 [2023-08-31 22:21:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:21:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:41,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:41,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:41,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657748980] [2023-08-31 22:21:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657748980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:41,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:21:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528039658] [2023-08-31 22:21:41,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:21:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:21:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:21:43,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 342 [2023-08-31 22:21:43,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 482 flow. Second operand has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:43,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:43,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 342 [2023-08-31 22:21:43,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:44,512 INFO L130 PetriNetUnfolder]: 2326/4329 cut-off events. [2023-08-31 22:21:44,512 INFO L131 PetriNetUnfolder]: For 3335/3335 co-relation queries the response was YES. [2023-08-31 22:21:44,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 4329 events. 2326/4329 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24551 event pairs, 697 based on Foata normal form. 38/4331 useless extension candidates. Maximal degree in co-relation 12396. Up to 2874 conditions per place. [2023-08-31 22:21:44,529 INFO L137 encePairwiseOnDemand]: 327/342 looper letters, 191 selfloop transitions, 33 changer transitions 0/224 dead transitions. [2023-08-31 22:21:44,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 224 transitions, 1476 flow [2023-08-31 22:21:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:21:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:21:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2610 transitions. [2023-08-31 22:21:44,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2023-08-31 22:21:44,534 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2610 transitions. [2023-08-31 22:21:44,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2610 transitions. [2023-08-31 22:21:44,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:44,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2610 transitions. [2023-08-31 22:21:44,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.52941176470588) internal successors, (2610), 17 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,548 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,548 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 482 flow. Second operand 17 states and 2610 transitions. [2023-08-31 22:21:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 224 transitions, 1476 flow [2023-08-31 22:21:44,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 224 transitions, 1471 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:21:44,561 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 820 flow [2023-08-31 22:21:44,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=820, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2023-08-31 22:21:44,562 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2023-08-31 22:21:44,562 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 820 flow [2023-08-31 22:21:44,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:44,563 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] [2023-08-31 22:21:44,572 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 [2023-08-31 22:21:44,772 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 [2023-08-31 22:21:44,772 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)] === [2023-08-31 22:21:44,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1081105184, now seen corresponding path program 1 times [2023-08-31 22:21:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471436355] [2023-08-31 22:21:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:44,773 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 [2023-08-31 22:21:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:44,774 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) [2023-08-31 22:21:44,774 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 [2023-08-31 22:21:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:44,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:44,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:44,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:44,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471436355] [2023-08-31 22:21:44,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471436355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:44,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581822811] [2023-08-31 22:21:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:44,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:44,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-31 22:21:44,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:44,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-31 22:21:44,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:45,389 INFO L130 PetriNetUnfolder]: 2567/4906 cut-off events. [2023-08-31 22:21:45,390 INFO L131 PetriNetUnfolder]: For 8199/8199 co-relation queries the response was YES. [2023-08-31 22:21:45,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 4906 events. 2567/4906 cut-off events. For 8199/8199 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 29718 event pairs, 1741 based on Foata normal form. 102/4954 useless extension candidates. Maximal degree in co-relation 16191. Up to 4025 conditions per place. [2023-08-31 22:21:45,410 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-31 22:21:45,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 157 transitions, 1508 flow [2023-08-31 22:21:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-31 22:21:45,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282651072124757 [2023-08-31 22:21:45,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-31 22:21:45,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-31 22:21:45,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:45,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-31 22:21:45,413 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) [2023-08-31 22:21:45,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,414 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 820 flow. Second operand 3 states and 542 transitions. [2023-08-31 22:21:45,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 157 transitions, 1508 flow [2023-08-31 22:21:45,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 157 transitions, 1482 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:45,440 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 815 flow [2023-08-31 22:21:45,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2023-08-31 22:21:45,440 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-31 22:21:45,440 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 815 flow [2023-08-31 22:21:45,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:45,441 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] [2023-08-31 22:21:45,453 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 [2023-08-31 22:21:45,650 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 [2023-08-31 22:21:45,650 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:45,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1405982527, now seen corresponding path program 1 times [2023-08-31 22:21:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741948370] [2023-08-31 22:21:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:45,651 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 [2023-08-31 22:21:45,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:45,653 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) [2023-08-31 22:21:45,653 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 [2023-08-31 22:21:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 22:21:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:45,864 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 [2023-08-31 22:21:46,075 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 [2023-08-31 22:21:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:46,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:46,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:46,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741948370] [2023-08-31 22:21:46,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741948370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:46,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:46,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:21:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278465907] [2023-08-31 22:21:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:21:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:21:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:21:47,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 342 [2023-08-31 22:21:47,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 815 flow. Second operand has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:47,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:47,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 342 [2023-08-31 22:21:47,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:49,621 INFO L130 PetriNetUnfolder]: 3358/6298 cut-off events. [2023-08-31 22:21:49,621 INFO L131 PetriNetUnfolder]: For 9484/9484 co-relation queries the response was YES. [2023-08-31 22:21:49,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21674 conditions, 6298 events. 3358/6298 cut-off events. For 9484/9484 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 38975 event pairs, 1092 based on Foata normal form. 12/6310 useless extension candidates. Maximal degree in co-relation 21632. Up to 4791 conditions per place. [2023-08-31 22:21:49,648 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 235 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2023-08-31 22:21:49,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 282 transitions, 2252 flow [2023-08-31 22:21:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 22:21:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 22:21:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3256 transitions. [2023-08-31 22:21:49,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41393338418510045 [2023-08-31 22:21:49,654 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3256 transitions. [2023-08-31 22:21:49,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3256 transitions. [2023-08-31 22:21:49,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:49,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3256 transitions. [2023-08-31 22:21:49,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.56521739130434) internal successors, (3256), 23 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:49,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:49,670 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:49,670 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 815 flow. Second operand 23 states and 3256 transitions. [2023-08-31 22:21:49,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 282 transitions, 2252 flow [2023-08-31 22:21:49,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2233 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:49,701 INFO L231 Difference]: Finished difference. Result has 154 places, 148 transitions, 1364 flow [2023-08-31 22:21:49,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1364, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2023-08-31 22:21:49,702 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2023-08-31 22:21:49,702 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 1364 flow [2023-08-31 22:21:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:49,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:49,703 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] [2023-08-31 22:21:49,713 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 [2023-08-31 22:21:49,912 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 [2023-08-31 22:21:49,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:49,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash -206120617, now seen corresponding path program 2 times [2023-08-31 22:21:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:49,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136720718] [2023-08-31 22:21:49,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:21:49,914 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 [2023-08-31 22:21:49,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:49,915 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) [2023-08-31 22:21:49,916 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 [2023-08-31 22:21:50,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:21:50,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:21:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 22:21:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:50,042 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-31 22:21:50,042 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 [2023-08-31 22:21:50,199 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 [2023-08-31 22:21:50,250 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 [2023-08-31 22:21:50,493 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 [2023-08-31 22:21:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:50,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:50,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136720718] [2023-08-31 22:21:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136720718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706164761] [2023-08-31 22:21:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-31 22:21:52,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 1364 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:52,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:52,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-31 22:21:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:53,891 INFO L130 PetriNetUnfolder]: 3953/7412 cut-off events. [2023-08-31 22:21:53,891 INFO L131 PetriNetUnfolder]: For 12534/12534 co-relation queries the response was YES. [2023-08-31 22:21:53,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26548 conditions, 7412 events. 3953/7412 cut-off events. For 12534/12534 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46900 event pairs, 1427 based on Foata normal form. 6/7418 useless extension candidates. Maximal degree in co-relation 26490. Up to 5783 conditions per place. [2023-08-31 22:21:53,942 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 236 selfloop transitions, 43 changer transitions 0/279 dead transitions. [2023-08-31 22:21:53,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 279 transitions, 2648 flow [2023-08-31 22:21:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:21:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:21:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2106 transitions. [2023-08-31 22:21:53,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-08-31 22:21:53,946 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2106 transitions. [2023-08-31 22:21:53,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2106 transitions. [2023-08-31 22:21:53,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:53,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2106 transitions. [2023-08-31 22:21:53,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 140.4) internal successors, (2106), 15 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:53,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:53,958 INFO L175 Difference]: Start difference. First operand has 154 places, 148 transitions, 1364 flow. Second operand 15 states and 2106 transitions. [2023-08-31 22:21:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 279 transitions, 2648 flow [2023-08-31 22:21:54,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 279 transitions, 2636 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:54,021 INFO L231 Difference]: Finished difference. Result has 177 places, 175 transitions, 1809 flow [2023-08-31 22:21:54,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1809, PETRI_PLACES=177, PETRI_TRANSITIONS=175} [2023-08-31 22:21:54,021 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2023-08-31 22:21:54,021 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 1809 flow [2023-08-31 22:21:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:54,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:54,022 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] [2023-08-31 22:21:54,035 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 [2023-08-31 22:21:54,232 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 [2023-08-31 22:21:54,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:54,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -329988519, now seen corresponding path program 3 times [2023-08-31 22:21:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680692016] [2023-08-31 22:21:54,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:21:54,234 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 [2023-08-31 22:21:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:54,235 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) [2023-08-31 22:21:54,237 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 [2023-08-31 22:21:54,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 22:21:54,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:21:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 22:21:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:54,361 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-31 22:21:54,362 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 [2023-08-31 22:21:54,508 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 [2023-08-31 22:21:54,608 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 [2023-08-31 22:21:54,839 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 [2023-08-31 22:21:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:54,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:54,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:54,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680692016] [2023-08-31 22:21:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680692016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:54,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100864252] [2023-08-31 22:21:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:56,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-31 22:21:56,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 1809 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:56,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-31 22:21:56,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:58,650 INFO L130 PetriNetUnfolder]: 3941/7388 cut-off events. [2023-08-31 22:21:58,650 INFO L131 PetriNetUnfolder]: For 14687/14687 co-relation queries the response was YES. [2023-08-31 22:21:58,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27411 conditions, 7388 events. 3941/7388 cut-off events. For 14687/14687 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 46779 event pairs, 1109 based on Foata normal form. 12/7400 useless extension candidates. Maximal degree in co-relation 27343. Up to 3611 conditions per place. [2023-08-31 22:21:58,700 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 193 selfloop transitions, 105 changer transitions 0/298 dead transitions. [2023-08-31 22:21:58,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 298 transitions, 2930 flow [2023-08-31 22:21:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 22:21:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 22:21:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3037 transitions. [2023-08-31 22:21:58,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036416799574694 [2023-08-31 22:21:58,705 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3037 transitions. [2023-08-31 22:21:58,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3037 transitions. [2023-08-31 22:21:58,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:58,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3037 transitions. [2023-08-31 22:21:58,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 138.04545454545453) internal successors, (3037), 22 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:58,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:58,716 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:58,716 INFO L175 Difference]: Start difference. First operand has 177 places, 175 transitions, 1809 flow. Second operand 22 states and 3037 transitions. [2023-08-31 22:21:58,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 298 transitions, 2930 flow [2023-08-31 22:21:58,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 298 transitions, 2911 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 22:21:58,770 INFO L231 Difference]: Finished difference. Result has 199 places, 186 transitions, 2146 flow [2023-08-31 22:21:58,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2146, PETRI_PLACES=199, PETRI_TRANSITIONS=186} [2023-08-31 22:21:58,771 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-31 22:21:58,771 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 186 transitions, 2146 flow [2023-08-31 22:21:58,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:58,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:58,771 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] [2023-08-31 22:21:58,781 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 (21)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:58,978 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 [2023-08-31 22:21:58,978 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)] === [2023-08-31 22:21:58,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 841701875, now seen corresponding path program 1 times [2023-08-31 22:21:58,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:58,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887752448] [2023-08-31 22:21:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:58,979 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 [2023-08-31 22:21:58,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:58,980 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) [2023-08-31 22:21:58,982 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 [2023-08-31 22:21:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:59,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:59,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887752448] [2023-08-31 22:21:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887752448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:59,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:21:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-31 22:21:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295712203] [2023-08-31 22:21:59,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:59,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:21:59,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:21:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:21:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-31 22:21:59,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 186 transitions, 2146 flow. Second operand has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:59,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:59,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-31 22:21:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:01,374 INFO L130 PetriNetUnfolder]: 7109/13924 cut-off events. [2023-08-31 22:22:01,375 INFO L131 PetriNetUnfolder]: For 36315/36319 co-relation queries the response was YES. [2023-08-31 22:22:01,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53946 conditions, 13924 events. 7109/13924 cut-off events. For 36315/36319 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 106504 event pairs, 2163 based on Foata normal form. 1756/15679 useless extension candidates. Maximal degree in co-relation 53873. Up to 3768 conditions per place. [2023-08-31 22:22:01,466 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 518 selfloop transitions, 22 changer transitions 0/551 dead transitions. [2023-08-31 22:22:01,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 551 transitions, 7226 flow [2023-08-31 22:22:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:22:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:22:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-08-31 22:22:01,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297270955165692 [2023-08-31 22:22:01,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-08-31 22:22:01,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-08-31 22:22:01,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:01,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-08-31 22:22:01,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,471 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,471 INFO L175 Difference]: Start difference. First operand has 199 places, 186 transitions, 2146 flow. Second operand 6 states and 1087 transitions. [2023-08-31 22:22:01,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 551 transitions, 7226 flow [2023-08-31 22:22:01,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 551 transitions, 6687 flow, removed 58 selfloop flow, removed 16 redundant places. [2023-08-31 22:22:01,597 INFO L231 Difference]: Finished difference. Result has 192 places, 197 transitions, 2161 flow [2023-08-31 22:22:01,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2161, PETRI_PLACES=192, PETRI_TRANSITIONS=197} [2023-08-31 22:22:01,598 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2023-08-31 22:22:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 197 transitions, 2161 flow [2023-08-31 22:22:01,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:01,599 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] [2023-08-31 22:22:01,609 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 [2023-08-31 22:22:01,808 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 [2023-08-31 22:22:01,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:01,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash -34660884, now seen corresponding path program 1 times [2023-08-31 22:22:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126422791] [2023-08-31 22:22:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:01,810 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 [2023-08-31 22:22:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:01,810 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) [2023-08-31 22:22:01,811 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 [2023-08-31 22:22:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:01,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:22:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:02,019 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-31 22:22:02,020 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:22:02,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-31 22:22:02,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-31 22:22:02,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-31 22:22:02,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-31 22:22:02,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-31 22:22:02,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-31 22:22:02,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-31 22:22:02,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-31 22:22:02,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-31 22:22:02,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-31 22:22:02,038 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 [2023-08-31 22:22:02,231 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 [2023-08-31 22:22:02,232 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] [2023-08-31 22:22:02,237 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:22:02,237 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:22:02,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:22:02 BasicIcfg [2023-08-31 22:22:02,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:22:02,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:22:02,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:22:02,291 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:22:02,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:13" (3/4) ... [2023-08-31 22:22:02,295 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:22:02,295 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:22:02,295 INFO L158 Benchmark]: Toolchain (without parser) took 50173.68ms. Allocated memory was 71.3MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 47.5MB in the beginning and 480.6MB in the end (delta: -433.0MB). Peak memory consumption was 645.8MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,296 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:02,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 650.34ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 34.9MB in the end (delta: 12.5MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.62ms. Allocated memory is still 71.3MB. Free memory was 34.9MB in the beginning and 32.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,296 INFO L158 Benchmark]: Boogie Preprocessor took 45.73ms. Allocated memory is still 71.3MB. Free memory was 32.2MB in the beginning and 30.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,297 INFO L158 Benchmark]: RCFGBuilder took 561.84ms. Allocated memory is still 71.3MB. Free memory was 30.1MB in the beginning and 30.7MB in the end (delta: -556.9kB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,297 INFO L158 Benchmark]: TraceAbstraction took 48828.70ms. Allocated memory was 71.3MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 30.3MB in the beginning and 481.6MB in the end (delta: -451.3MB). Peak memory consumption was 623.6MB. Max. memory is 16.1GB. [2023-08-31 22:22:02,297 INFO L158 Benchmark]: Witness Printer took 3.95ms. Allocated memory is still 1.1GB. Free memory is still 480.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:02,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 650.34ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 34.9MB in the end (delta: 12.5MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.62ms. Allocated memory is still 71.3MB. Free memory was 34.9MB in the beginning and 32.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.73ms. Allocated memory is still 71.3MB. Free memory was 32.2MB in the beginning and 30.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 561.84ms. Allocated memory is still 71.3MB. Free memory was 30.1MB in the beginning and 30.7MB in the end (delta: -556.9kB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * TraceAbstraction took 48828.70ms. Allocated memory was 71.3MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 30.3MB in the beginning and 481.6MB in the end (delta: -451.3MB). Peak memory consumption was 623.6MB. Max. memory is 16.1GB. * Witness Printer took 3.95ms. Allocated memory is still 1.1GB. Free memory is still 480.6MB. 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: 8.7s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 168 TotalNumberOfCompositions, 12825 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8572, independent: 8355, independent conditional: 0, independent unconditional: 8355, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4552, independent: 4498, independent conditional: 0, independent unconditional: 4498, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8572, independent: 3857, independent conditional: 0, independent unconditional: 3857, dependent: 163, dependent conditional: 0, dependent unconditional: 163, unknown: 4552, unknown conditional: 0, unknown unconditional: 4552] , Statistics on independence cache: Total cache size (in pairs): 279, Positive cache size: 258, Positive conditional cache size: 0, Positive unconditional cache size: 258, 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: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] 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))=-1, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] 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))=0, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 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: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1024]: 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: 1023]: 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: 941]: 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, 265 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: 48.6s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5379 SdHoareTripleChecker+Valid, 18.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4560 mSDsluCounter, 6156 SdHoareTripleChecker+Invalid, 15.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6069 mSDsCounter, 177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21308 IncrementalHoareTripleChecker+Invalid, 21485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 177 mSolverCounterUnsat, 87 mSDtfsCounter, 21308 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2161occurred in iteration=21, InterpolantAutomatonStates: 160, 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, 3.3s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2414 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2088 ConjunctsInSsa, 208 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 [2023-08-31 22:22:02,318 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