./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:43:46,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:43:46,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:43:46,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:43:46,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:43:46,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:43:46,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:43:46,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:43:46,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:43:46,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:43:46,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:43:46,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:43:46,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:43:46,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:43:46,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:43:46,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:43:46,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:43:46,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:43:46,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:43:46,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:43:46,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:43:46,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:43:46,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:43:46,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:43:46,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:43:46,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:43:46,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:43:46,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:43:46,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:43:46,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:43:46,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:43:46,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:43:46,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:43:46,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:43:46,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:43:46,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:43:46,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:43:46,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:43:46,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:43:46,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:43:46,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:43:46,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:43:46,643 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:43:46,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:43:46,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:43:46,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:43:46,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:43:46,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:43:46,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:43:46,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:43:46,646 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:43:46,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:43:46,646 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:43:46,646 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:43:46,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:43:46,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:43:46,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:43:46,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:43:46,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:43:46,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:43:46,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:43:46,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:43:46,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:46,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:43:46,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:43:46,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:43:46,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:43:46,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:43:46,650 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:43:46,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:43:46,650 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:43:46,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:43:46,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:43:46,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:43:46,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:43:46,996 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:43:46,996 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:43:46,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-29 19:43:48,246 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:43:48,518 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:43:48,518 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-29 19:43:48,529 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26a56c14/37f8911ad02f4fd6a14475efaa29fe9e/FLAG5788bd34e [2023-08-29 19:43:48,540 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26a56c14/37f8911ad02f4fd6a14475efaa29fe9e [2023-08-29 19:43:48,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:43:48,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:43:48,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:48,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:43:48,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:43:48,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:48" (1/1) ... [2023-08-29 19:43:48,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69db0fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:48, skipping insertion in model container [2023-08-29 19:43:48,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:48" (1/1) ... [2023-08-29 19:43:48,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:43:48,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:43:49,012 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_longest-2.i[41530,41543] [2023-08-29 19:43:49,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:49,056 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:43:49,102 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_longest-2.i[41530,41543] [2023-08-29 19:43:49,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:49,214 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:43:49,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49 WrapperNode [2023-08-29 19:43:49,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:49,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:49,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:43:49,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:43:49,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,282 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-29 19:43:49,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:49,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:43:49,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:43:49,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:43:49,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,317 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:43:49,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:43:49,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:43:49,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:43:49,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (1/1) ... [2023-08-29 19:43:49,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:49,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:43:49,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:43:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:43:49,405 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:43:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:43:49,405 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:43:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:43:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:43:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:43:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:43:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:43:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:43:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:43:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:43:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:43:49,408 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:43:49,594 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:43:49,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:43:49,796 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:43:49,804 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:43:49,804 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:43:49,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:49 BoogieIcfgContainer [2023-08-29 19:43:49,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:43:49,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:43:49,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:43:49,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:43:49,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:43:48" (1/3) ... [2023-08-29 19:43:49,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201cda38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:49, skipping insertion in model container [2023-08-29 19:43:49,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:49" (2/3) ... [2023-08-29 19:43:49,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201cda38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:49, skipping insertion in model container [2023-08-29 19:43:49,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:49" (3/3) ... [2023-08-29 19:43:49,813 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-29 19:43:49,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:43:49,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:43:49,828 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:43:49,985 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:43:50,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-29 19:43:50,097 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-29 19:43:50,099 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 10/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 412 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-29 19:43:50,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-29 19:43:50,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-29 19:43:50,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:43:50,131 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-29 19:43:50,133 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-29 19:43:50,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-29 19:43:50,163 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-29 19:43:50,163 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:50,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 10/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-29 19:43:50,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-29 19:43:54,477 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-29 19:43:54,478 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-29 19:43:54,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:43:54,495 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;@7d84528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:43:54,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:43:54,497 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:43:54,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:43:54,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:54,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:43:54,498 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)] === [2023-08-29 19:43:54,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-29 19:43:54,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:54,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761146509] [2023-08-29 19:43:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:54,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:54,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761146509] [2023-08-29 19:43:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761146509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:54,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:43:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346465943] [2023-08-29 19:43:54,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:43:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:43:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:43:54,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-29 19:43:54,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:54,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:54,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-29 19:43:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:54,934 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-29 19:43:54,934 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 19:43:54,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9149 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-08-29 19:43:54,950 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-29 19:43:54,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-29 19:43:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:43:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:43:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-29 19:43:54,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-29 19:43:54,971 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-29 19:43:54,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-29 19:43:54,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:54,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-29 19:43:54,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:54,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:54,990 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:54,991 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-29 19:43:54,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-29 19:43:54,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:54,997 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-29 19:43:54,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-29 19:43:55,002 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-29 19:43:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-29 19:43:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:55,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:43:55,005 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)] === [2023-08-29 19:43:55,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-29 19:43:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:55,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025318231] [2023-08-29 19:43:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025318231] [2023-08-29 19:43:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025318231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:55,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135532010] [2023-08-29 19:43:55,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:55,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:55,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:55,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-29 19:43:55,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:55,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-29 19:43:55,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:55,507 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-29 19:43:55,508 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8798 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-08-29 19:43:55,518 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-29 19:43:55,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-29 19:43:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-29 19:43:55,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-29 19:43:55,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-29 19:43:55,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-29 19:43:55,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:55,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-29 19:43:55,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-29 19:43:55,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,528 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-29 19:43:55,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-29 19:43:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:55,530 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-29 19:43:55,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-29 19:43:55,531 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-29 19:43:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-29 19:43:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:55,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:43:55,532 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)] === [2023-08-29 19:43:55,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-29 19:43:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:55,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266991808] [2023-08-29 19:43:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266991808] [2023-08-29 19:43:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266991808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:55,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246926673] [2023-08-29 19:43:55,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:55,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-29 19:43:55,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:55,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-29 19:43:55,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:55,794 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-29 19:43:55,795 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:55,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8455 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-08-29 19:43:55,806 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:43:55,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-29 19:43:55,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-29 19:43:55,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-29 19:43:55,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-29 19:43:55,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:55,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-29 19:43:55,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,813 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-29 19:43:55,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:55,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:55,815 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:55,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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} [2023-08-29 19:43:55,816 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-29 19:43:55,816 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:55,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:55,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:55,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:55,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:43:55,818 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)] === [2023-08-29 19:43:55,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-29 19:43:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:55,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897842698] [2023-08-29 19:43:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:55,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:55,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897842698] [2023-08-29 19:43:55,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897842698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:55,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874069966] [2023-08-29 19:43:55,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:43:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:43:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:43:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-29 19:43:56,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:56,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-29 19:43:56,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:56,187 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-29 19:43:56,188 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:56,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6042 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-08-29 19:43:56,197 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:43:56,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-29 19:43:56,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-29 19:43:56,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-29 19:43:56,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-29 19:43:56,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:56,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-29 19:43:56,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,206 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-29 19:43:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:56,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:56,208 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:56,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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} [2023-08-29 19:43:56,210 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-29 19:43:56,210 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:56,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:56,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:43:56,211 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)] === [2023-08-29 19:43:56,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-29 19:43:56,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:56,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758241095] [2023-08-29 19:43:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:56,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758241095] [2023-08-29 19:43:56,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758241095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:56,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:56,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849464301] [2023-08-29 19:43:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:43:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:43:56,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:43:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-29 19:43:56,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:56,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-29 19:43:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:56,457 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-29 19:43:56,458 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:56,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3804 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-08-29 19:43:56,462 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-29 19:43:56,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-29 19:43:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-29 19:43:56,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-29 19:43:56,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-29 19:43:56,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-29 19:43:56,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:56,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-29 19:43:56,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,469 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-29 19:43:56,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-29 19:43:56,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:56,470 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-29 19:43:56,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-29 19:43:56,471 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-29 19:43:56,471 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-29 19:43:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:56,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:56,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:43:56,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:56,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-29 19:43:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:56,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227109944] [2023-08-29 19:43:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:56,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:56,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227109944] [2023-08-29 19:43:56,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227109944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:56,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:56,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:56,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313498710] [2023-08-29 19:43:56,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-29 19:43:56,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:56,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-29 19:43:56,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:56,883 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-29 19:43:56,883 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:56,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4962 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 669 conditions per place. [2023-08-29 19:43:56,888 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-29 19:43:56,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-29 19:43:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-29 19:43:56,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-29 19:43:56,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-29 19:43:56,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-29 19:43:56,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:56,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-29 19:43:56,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,898 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-29 19:43:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-29 19:43:56,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:56,900 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-29 19:43:56,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:43:56,900 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-29 19:43:56,901 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-29 19:43:56,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:56,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:56,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:43:56,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:56,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-29 19:43:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:56,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063932094] [2023-08-29 19:43:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:57,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063932094] [2023-08-29 19:43:57,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063932094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:57,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:57,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437601079] [2023-08-29 19:43:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:57,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:57,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:57,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-29 19:43:57,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:57,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-29 19:43:57,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:57,495 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-29 19:43:57,495 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-29 19:43:57,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 959 events. 570/959 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3672 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 2014. Up to 754 conditions per place. [2023-08-29 19:43:57,500 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-29 19:43:57,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-29 19:43:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-29 19:43:57,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-29 19:43:57,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-29 19:43:57,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-29 19:43:57,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:57,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-29 19:43:57,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2023-08-29 19:43:57,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,509 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-29 19:43:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-29 19:43:57,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:57,513 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-29 19:43:57,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=89, 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=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-29 19:43:57,514 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-29 19:43:57,514 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-29 19:43:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:57,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:57,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:43:57,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:57,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-29 19:43:57,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:57,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832189390] [2023-08-29 19:43:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:57,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:57,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:57,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832189390] [2023-08-29 19:43:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832189390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340667354] [2023-08-29 19:43:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:57,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:43:57,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 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) [2023-08-29 19:43:57,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:57,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:43:57,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:57,695 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-29 19:43:57,695 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-29 19:43:57,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1052 events. 615/1052 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4589 event pairs, 276 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2380. Up to 922 conditions per place. [2023-08-29 19:43:57,701 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-29 19:43:57,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-29 19:43:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-29 19:43:57,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-29 19:43:57,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-29 19:43:57,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-29 19:43:57,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:57,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-29 19:43:57,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,715 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-29 19:43:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-29 19:43:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:57,718 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-29 19:43:57,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-29 19:43:57,721 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-29 19:43:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-29 19:43:57,722 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) [2023-08-29 19:43:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:57,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:43:57,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:57,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:57,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-29 19:43:57,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:57,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641472301] [2023-08-29 19:43:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:57,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:57,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641472301] [2023-08-29 19:43:57,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641472301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:57,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:57,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775134717] [2023-08-29 19:43:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:57,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:43:57,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:57,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:43:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:57,895 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-29 19:43:57,895 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-29 19:43:57,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1077 events. 638/1077 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4691 event pairs, 219 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 2637. Up to 861 conditions per place. [2023-08-29 19:43:57,901 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-29 19:43:57,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-29 19:43:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-29 19:43:57,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-29 19:43:57,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-29 19:43:57,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-29 19:43:57,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:57,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-29 19:43:57,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,907 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-29 19:43:57,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-29 19:43:57,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:57,912 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-29 19:43:57,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-29 19:43:57,913 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-29 19:43:57,914 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-29 19:43:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:57,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:57,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:43:57,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:57,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-29 19:43:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:57,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422265011] [2023-08-29 19:43:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:57,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422265011] [2023-08-29 19:43:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422265011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742719042] [2023-08-29 19:43:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:58,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:58,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:43:58,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:43:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 19:43:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:58,452 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 [2023-08-29 19:43:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:58,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742719042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:58,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-29 19:43:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678965435] [2023-08-29 19:43:58,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:58,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:43:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:43:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:44:00,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-29 19:44:00,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:00,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:00,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-29 19:44:00,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:01,254 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-29 19:44:01,255 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-29 19:44:01,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2796 events. 1709/2796 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13219 event pairs, 169 based on Foata normal form. 66/2424 useless extension candidates. Maximal degree in co-relation 6980. Up to 1096 conditions per place. [2023-08-29 19:44:01,273 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-29 19:44:01,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-29 19:44:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:44:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:44:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-29 19:44:01,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-29 19:44:01,278 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-29 19:44:01,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-29 19:44:01,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:01,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-29 19:44:01,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.71428571428572) internal successors, (2166), 14 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,290 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,290 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-29 19:44:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-29 19:44:01,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 226 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:01,295 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-29 19:44:01,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-29 19:44:01,296 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-29 19:44:01,296 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-29 19:44:01,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:01,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:01,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 19:44:01,504 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,SelfDestructingSolverStorable9 [2023-08-29 19:44:01,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:01,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-29 19:44:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970984119] [2023-08-29 19:44:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970984119] [2023-08-29 19:44:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970984119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494233098] [2023-08-29 19:44:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:01,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:01,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-29 19:44:01,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 308 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) [2023-08-29 19:44:01,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:01,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-29 19:44:01,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:01,724 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-29 19:44:01,724 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-29 19:44:01,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 940 events. 487/940 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4019 event pairs, 73 based on Foata normal form. 42/912 useless extension candidates. Maximal degree in co-relation 2665. Up to 682 conditions per place. [2023-08-29 19:44:01,730 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-29 19:44:01,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-29 19:44:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-29 19:44:01,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-29 19:44:01,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-29 19:44:01,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-29 19:44:01,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:01,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-29 19:44:01,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,736 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-29 19:44:01,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-29 19:44:01,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 374 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:01,742 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-29 19:44:01,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-29 19:44:01,743 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-29 19:44:01,743 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-29 19:44:01,744 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) [2023-08-29 19:44:01,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:01,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:01,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:44:01,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:01,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-29 19:44:01,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953312690] [2023-08-29 19:44:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:01,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953312690] [2023-08-29 19:44:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953312690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:02,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:44:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738671227] [2023-08-29 19:44:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:44:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:44:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:44:02,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-29 19:44:02,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:02,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:02,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-29 19:44:02,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:03,489 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-29 19:44:03,489 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-29 19:44:03,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 1286 events. 695/1286 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5603 event pairs, 103 based on Foata normal form. 12/1272 useless extension candidates. Maximal degree in co-relation 3576. Up to 672 conditions per place. [2023-08-29 19:44:03,496 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-29 19:44:03,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-29 19:44:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:44:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:44:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-29 19:44:03,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-29 19:44:03,501 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-29 19:44:03,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-29 19:44:03,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:03,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-29 19:44:03,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.69230769230768) internal successors, (1842), 13 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:03,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:03,512 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:03,512 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-29 19:44:03,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-29 19:44:03,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 155 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:03,518 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-29 19:44:03,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=360, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-29 19:44:03,518 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-29 19:44:03,518 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-29 19:44:03,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:03,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:03,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:44:03,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:03,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-29 19:44:03,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:03,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160257356] [2023-08-29 19:44:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:03,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:03,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160257356] [2023-08-29 19:44:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160257356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:03,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:44:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133235514] [2023-08-29 19:44:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:44:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:44:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:44:03,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-29 19:44:03,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 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) [2023-08-29 19:44:03,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:03,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-29 19:44:03,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:04,095 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-29 19:44:04,096 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-29 19:44:04,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1464 events. 763/1464 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6962 event pairs, 81 based on Foata normal form. 0/1406 useless extension candidates. Maximal degree in co-relation 4405. Up to 656 conditions per place. [2023-08-29 19:44:04,105 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-29 19:44:04,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-29 19:44:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:44:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:44:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-29 19:44:04,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-29 19:44:04,112 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-29 19:44:04,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-29 19:44:04,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:04,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-29 19:44:04,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,119 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,119 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-29 19:44:04,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-29 19:44:04,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 727 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:04,126 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-29 19:44:04,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-29 19:44:04,127 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-29 19:44:04,127 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-29 19:44:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 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) [2023-08-29 19:44:04,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:04,128 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] [2023-08-29 19:44:04,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:44:04,128 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:04,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-29 19:44:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:04,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001617279] [2023-08-29 19:44:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:44:04,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001617279] [2023-08-29 19:44:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001617279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660433563] [2023-08-29 19:44:04,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-29 19:44:04,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:04,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-29 19:44:04,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:04,393 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-29 19:44:04,393 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-29 19:44:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1898 events. 987/1898 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9777 event pairs, 573 based on Foata normal form. 70/1886 useless extension candidates. Maximal degree in co-relation 6033. Up to 1351 conditions per place. [2023-08-29 19:44:04,406 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-29 19:44:04,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-29 19:44:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 19:44:04,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-29 19:44:04,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 19:44:04,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 19:44:04,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:04,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 19:44:04,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,413 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-29 19:44:04,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-29 19:44:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 925 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:04,424 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-29 19:44:04,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-29 19:44:04,425 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-29 19:44:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-29 19:44:04,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:04,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 19:44:04,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:44:04,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:04,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-29 19:44:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745790013] [2023-08-29 19:44:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:04,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745790013] [2023-08-29 19:44:04,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745790013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956660858] [2023-08-29 19:44:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:04,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:04,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:04,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:04,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:44:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:04,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:44:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:04,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956660858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:04,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-29 19:44:04,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222791085] [2023-08-29 19:44:04,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:04,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:44:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:44:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:44:04,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-29 19:44:04,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 449 flow. Second operand has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:04,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-29 19:44:04,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:05,576 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-29 19:44:05,576 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-29 19:44:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 3874 events. 2081/3874 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20117 event pairs, 473 based on Foata normal form. 96/3952 useless extension candidates. Maximal degree in co-relation 12489. Up to 989 conditions per place. [2023-08-29 19:44:05,599 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-29 19:44:05,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-29 19:44:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 19:44:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 19:44:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-29 19:44:05,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-29 19:44:05,606 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-29 19:44:05,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-29 19:44:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:05,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-29 19:44:05,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:05,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:05,619 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:05,619 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-29 19:44:05,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-29 19:44:05,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 278 transitions, 1986 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:05,636 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-29 19:44:05,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-29 19:44:05,637 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-29 19:44:05,637 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-29 19:44:05,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:05,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:05,638 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] [2023-08-29 19:44:05,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:05,845 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,SelfDestructingSolverStorable14 [2023-08-29 19:44:05,845 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:05,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-29 19:44:05,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:05,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158405638] [2023-08-29 19:44:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:06,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158405638] [2023-08-29 19:44:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158405638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:44:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934110775] [2023-08-29 19:44:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:44:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:44:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:44:06,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-29 19:44:06,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:06,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:06,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-29 19:44:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:07,980 INFO L130 PetriNetUnfolder]: 2294/4458 cut-off events. [2023-08-29 19:44:07,981 INFO L131 PetriNetUnfolder]: For 9348/9348 co-relation queries the response was YES. [2023-08-29 19:44:07,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16303 conditions, 4458 events. 2294/4458 cut-off events. For 9348/9348 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 25662 event pairs, 748 based on Foata normal form. 18/4440 useless extension candidates. Maximal degree in co-relation 16266. Up to 3174 conditions per place. [2023-08-29 19:44:08,010 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 169 selfloop transitions, 14 changer transitions 0/199 dead transitions. [2023-08-29 19:44:08,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1773 flow [2023-08-29 19:44:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:44:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:44:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1326 transitions. [2023-08-29 19:44:08,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505606523955148 [2023-08-29 19:44:08,015 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1326 transitions. [2023-08-29 19:44:08,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1326 transitions. [2023-08-29 19:44:08,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:08,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1326 transitions. [2023-08-29 19:44:08,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.33333333333334) internal successors, (1326), 9 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:08,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:08,024 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:08,024 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 9 states and 1326 transitions. [2023-08-29 19:44:08,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1773 flow [2023-08-29 19:44:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1647 flow, removed 60 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:08,064 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 980 flow [2023-08-29 19:44:08,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2023-08-29 19:44:08,066 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 70 predicate places. [2023-08-29 19:44:08,066 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 980 flow [2023-08-29 19:44:08,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:08,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:08,067 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] [2023-08-29 19:44:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:44:08,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:08,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 2 times [2023-08-29 19:44:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515124949] [2023-08-29 19:44:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515124949] [2023-08-29 19:44:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515124949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:08,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:44:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269139289] [2023-08-29 19:44:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:08,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:44:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:44:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:44:09,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-29 19:44:09,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 980 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:09,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:09,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-29 19:44:09,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:10,252 INFO L130 PetriNetUnfolder]: 2480/4820 cut-off events. [2023-08-29 19:44:10,252 INFO L131 PetriNetUnfolder]: For 8623/8623 co-relation queries the response was YES. [2023-08-29 19:44:10,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 4820 events. 2480/4820 cut-off events. For 8623/8623 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 28362 event pairs, 718 based on Foata normal form. 12/4794 useless extension candidates. Maximal degree in co-relation 17181. Up to 2760 conditions per place. [2023-08-29 19:44:10,292 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 157 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2023-08-29 19:44:10,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 197 transitions, 1702 flow [2023-08-29 19:44:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:44:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:44:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1596 transitions. [2023-08-29 19:44:10,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44370308590492075 [2023-08-29 19:44:10,297 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1596 transitions. [2023-08-29 19:44:10,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1596 transitions. [2023-08-29 19:44:10,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:10,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1596 transitions. [2023-08-29 19:44:10,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.0909090909091) internal successors, (1596), 11 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:10,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:10,307 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:10,307 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 980 flow. Second operand 11 states and 1596 transitions. [2023-08-29 19:44:10,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 197 transitions, 1702 flow [2023-08-29 19:44:10,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 1676 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:10,343 INFO L231 Difference]: Finished difference. Result has 127 places, 133 transitions, 1116 flow [2023-08-29 19:44:10,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2023-08-29 19:44:10,344 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 79 predicate places. [2023-08-29 19:44:10,344 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 1116 flow [2023-08-29 19:44:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:10,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:10,345 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] [2023-08-29 19:44:10,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:44:10,345 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:10,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-29 19:44:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:10,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919982227] [2023-08-29 19:44:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:10,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:44:10,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:10,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919982227] [2023-08-29 19:44:10,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919982227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:10,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103141553] [2023-08-29 19:44:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:10,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:10,403 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) [2023-08-29 19:44:10,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:44:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:44:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:44:10,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:44:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103141553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:10,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:44:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646745373] [2023-08-29 19:44:10,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:44:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:44:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:44:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-29 19:44:10,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 1116 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 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) [2023-08-29 19:44:10,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:10,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-29 19:44:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:11,856 INFO L130 PetriNetUnfolder]: 4522/9156 cut-off events. [2023-08-29 19:44:11,856 INFO L131 PetriNetUnfolder]: For 18790/18790 co-relation queries the response was YES. [2023-08-29 19:44:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33205 conditions, 9156 events. 4522/9156 cut-off events. For 18790/18790 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 64662 event pairs, 1602 based on Foata normal form. 1236/10338 useless extension candidates. Maximal degree in co-relation 33162. Up to 2382 conditions per place. [2023-08-29 19:44:11,916 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 403 selfloop transitions, 18 changer transitions 0/437 dead transitions. [2023-08-29 19:44:11,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 437 transitions, 4638 flow [2023-08-29 19:44:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:44:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:44:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-29 19:44:11,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-29 19:44:11,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-29 19:44:11,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-29 19:44:11,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:11,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-29 19:44:11,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:11,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:11,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:11,924 INFO L175 Difference]: Start difference. First operand has 127 places, 133 transitions, 1116 flow. Second operand 6 states and 1036 transitions. [2023-08-29 19:44:11,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 437 transitions, 4638 flow [2023-08-29 19:44:12,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 437 transitions, 4548 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-29 19:44:12,016 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1237 flow [2023-08-29 19:44:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1237, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2023-08-29 19:44:12,017 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 83 predicate places. [2023-08-29 19:44:12,017 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1237 flow [2023-08-29 19:44:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 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) [2023-08-29 19:44:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:12,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 19:44:12,224 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:12,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1549751406, now seen corresponding path program 1 times [2023-08-29 19:44:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058640867] [2023-08-29 19:44:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 19:44:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058640867] [2023-08-29 19:44:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058640867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:12,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083669442] [2023-08-29 19:44:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:12,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:12,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-29 19:44:12,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1237 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:12,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:12,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-29 19:44:12,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:13,362 INFO L130 PetriNetUnfolder]: 4408/8841 cut-off events. [2023-08-29 19:44:13,362 INFO L131 PetriNetUnfolder]: For 24434/24434 co-relation queries the response was YES. [2023-08-29 19:44:13,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34965 conditions, 8841 events. 4408/8841 cut-off events. For 24434/24434 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 60323 event pairs, 2471 based on Foata normal form. 288/9075 useless extension candidates. Maximal degree in co-relation 34919. Up to 5923 conditions per place. [2023-08-29 19:44:13,418 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 125 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2023-08-29 19:44:13,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 150 transitions, 1558 flow [2023-08-29 19:44:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-29 19:44:13,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-29 19:44:13,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-29 19:44:13,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-29 19:44:13,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:13,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-29 19:44:13,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:13,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:13,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:13,423 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1237 flow. Second operand 3 states and 503 transitions. [2023-08-29 19:44:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 150 transitions, 1558 flow [2023-08-29 19:44:13,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1496 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-29 19:44:13,495 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 1149 flow [2023-08-29 19:44:13,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1149, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-29 19:44:13,496 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2023-08-29 19:44:13,496 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 1149 flow [2023-08-29 19:44:13,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:13,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:13,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:13,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:44:13,497 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:13,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1400322095, now seen corresponding path program 1 times [2023-08-29 19:44:13,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:13,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207669862] [2023-08-29 19:44:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:13,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:13,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207669862] [2023-08-29 19:44:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207669862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581463693] [2023-08-29 19:44:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:13,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:13,577 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) [2023-08-29 19:44:13,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:44:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:44:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:44:13,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581463693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:13,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:44:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-29 19:44:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335491984] [2023-08-29 19:44:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:13,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:44:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:44:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:44:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-29 19:44:13,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 1149 flow. Second operand has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:13,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:13,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-29 19:44:13,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:14,840 INFO L130 PetriNetUnfolder]: 4023/7961 cut-off events. [2023-08-29 19:44:14,840 INFO L131 PetriNetUnfolder]: For 25246/25246 co-relation queries the response was YES. [2023-08-29 19:44:14,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31958 conditions, 7961 events. 4023/7961 cut-off events. For 25246/25246 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 51797 event pairs, 1253 based on Foata normal form. 66/8001 useless extension candidates. Maximal degree in co-relation 31913. Up to 4162 conditions per place. [2023-08-29 19:44:14,892 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 168 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2023-08-29 19:44:14,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 192 transitions, 1911 flow [2023-08-29 19:44:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:44:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:44:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-08-29 19:44:14,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857288481141692 [2023-08-29 19:44:14,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-08-29 19:44:14,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-08-29 19:44:14,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:14,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-08-29 19:44:14,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,905 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 1149 flow. Second operand 6 states and 953 transitions. [2023-08-29 19:44:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 192 transitions, 1911 flow [2023-08-29 19:44:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1861 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-29 19:44:14,992 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 1180 flow [2023-08-29 19:44:14,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2023-08-29 19:44:14,993 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2023-08-29 19:44:14,993 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 1180 flow [2023-08-29 19:44:14,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:14,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:14,994 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] [2023-08-29 19:44:15,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:15,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:15,200 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:15,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1400323650, now seen corresponding path program 1 times [2023-08-29 19:44:15,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:15,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287366407] [2023-08-29 19:44:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:15,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287366407] [2023-08-29 19:44:15,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287366407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188387676] [2023-08-29 19:44:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:15,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:15,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:15,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 19:44:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 19:44:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:16,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:44:16,275 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 35 treesize of output 39 [2023-08-29 19:44:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188387676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:16,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-29 19:44:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51825402] [2023-08-29 19:44:16,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:16,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-29 19:44:16,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-29 19:44:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-29 19:44:18,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-29 19:44:18,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 1180 flow. Second operand has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:18,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:18,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-29 19:44:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:22,331 INFO L130 PetriNetUnfolder]: 4563/8995 cut-off events. [2023-08-29 19:44:22,331 INFO L131 PetriNetUnfolder]: For 27869/27869 co-relation queries the response was YES. [2023-08-29 19:44:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36488 conditions, 8995 events. 4563/8995 cut-off events. For 27869/27869 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 60358 event pairs, 476 based on Foata normal form. 124/9083 useless extension candidates. Maximal degree in co-relation 36441. Up to 2686 conditions per place. [2023-08-29 19:44:22,386 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 228 selfloop transitions, 113 changer transitions 0/341 dead transitions. [2023-08-29 19:44:22,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 341 transitions, 3043 flow [2023-08-29 19:44:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 19:44:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 19:44:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-29 19:44:22,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-29 19:44:22,394 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-29 19:44:22,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-29 19:44:22,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:22,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-29 19:44:22,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.82857142857142) internal successors, (4719), 35 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,414 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,415 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 1180 flow. Second operand 35 states and 4719 transitions. [2023-08-29 19:44:22,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 341 transitions, 3043 flow [2023-08-29 19:44:22,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 341 transitions, 3029 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:22,504 INFO L231 Difference]: Finished difference. Result has 167 places, 162 transitions, 1734 flow [2023-08-29 19:44:22,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1734, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2023-08-29 19:44:22,505 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 119 predicate places. [2023-08-29 19:44:22,505 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 1734 flow [2023-08-29 19:44:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:22,506 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-29 19:44:22,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:22,712 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:22,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-29 19:44:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284375100] [2023-08-29 19:44:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284375100] [2023-08-29 19:44:23,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284375100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889452224] [2023-08-29 19:44:23,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:44:23,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:23,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:23,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 19:44:23,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:44:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-29 19:44:23,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:23,811 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:44:23,811 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 [2023-08-29 19:44:23,833 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:44:23,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-29 19:44:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:24,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889452224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:24,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 40 [2023-08-29 19:44:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408515842] [2023-08-29 19:44:24,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-29 19:44:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-29 19:44:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2023-08-29 19:44:29,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-29 19:44:29,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 1734 flow. Second operand has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:29,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:29,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-29 19:44:29,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:33,181 INFO L130 PetriNetUnfolder]: 6671/13151 cut-off events. [2023-08-29 19:44:33,181 INFO L131 PetriNetUnfolder]: For 48656/48656 co-relation queries the response was YES. [2023-08-29 19:44:33,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58206 conditions, 13151 events. 6671/13151 cut-off events. For 48656/48656 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 88741 event pairs, 1994 based on Foata normal form. 204/13287 useless extension candidates. Maximal degree in co-relation 58157. Up to 7320 conditions per place. [2023-08-29 19:44:33,279 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 430 selfloop transitions, 66 changer transitions 0/496 dead transitions. [2023-08-29 19:44:33,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 496 transitions, 5061 flow [2023-08-29 19:44:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 19:44:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 19:44:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4515 transitions. [2023-08-29 19:44:33,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44539804675939626 [2023-08-29 19:44:33,285 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4515 transitions. [2023-08-29 19:44:33,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4515 transitions. [2023-08-29 19:44:33,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:33,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4515 transitions. [2023-08-29 19:44:33,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 145.6451612903226) internal successors, (4515), 31 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:33,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:33,300 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:33,300 INFO L175 Difference]: Start difference. First operand has 167 places, 162 transitions, 1734 flow. Second operand 31 states and 4515 transitions. [2023-08-29 19:44:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 496 transitions, 5061 flow [2023-08-29 19:44:33,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 496 transitions, 4446 flow, removed 221 selfloop flow, removed 15 redundant places. [2023-08-29 19:44:33,561 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2092 flow [2023-08-29 19:44:33,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2092, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2023-08-29 19:44:33,561 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 146 predicate places. [2023-08-29 19:44:33,562 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2092 flow [2023-08-29 19:44:33,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:33,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:33,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:33,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:33,763 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:33,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1895523700, now seen corresponding path program 3 times [2023-08-29 19:44:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207222357] [2023-08-29 19:44:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:44:34,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207222357] [2023-08-29 19:44:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207222357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:34,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:44:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366865471] [2023-08-29 19:44:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:44:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:44:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:44:35,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-29 19:44:35,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2092 flow. Second operand has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:35,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:35,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-29 19:44:35,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:39,183 INFO L130 PetriNetUnfolder]: 8805/17698 cut-off events. [2023-08-29 19:44:39,184 INFO L131 PetriNetUnfolder]: For 54807/54829 co-relation queries the response was YES. [2023-08-29 19:44:39,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74247 conditions, 17698 events. 8805/17698 cut-off events. For 54807/54829 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 131752 event pairs, 1576 based on Foata normal form. 42/17499 useless extension candidates. Maximal degree in co-relation 74191. Up to 4381 conditions per place. [2023-08-29 19:44:39,296 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 212 selfloop transitions, 301 changer transitions 0/522 dead transitions. [2023-08-29 19:44:39,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 522 transitions, 5635 flow [2023-08-29 19:44:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 19:44:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 19:44:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4387 transitions. [2023-08-29 19:44:39,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065424891112964 [2023-08-29 19:44:39,301 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4387 transitions. [2023-08-29 19:44:39,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4387 transitions. [2023-08-29 19:44:39,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:39,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4387 transitions. [2023-08-29 19:44:39,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 132.93939393939394) internal successors, (4387), 33 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:39,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:39,315 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:39,315 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2092 flow. Second operand 33 states and 4387 transitions. [2023-08-29 19:44:39,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 522 transitions, 5635 flow [2023-08-29 19:44:39,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 522 transitions, 5393 flow, removed 89 selfloop flow, removed 11 redundant places. [2023-08-29 19:44:39,631 INFO L231 Difference]: Finished difference. Result has 222 places, 387 transitions, 4552 flow [2023-08-29 19:44:39,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4552, PETRI_PLACES=222, PETRI_TRANSITIONS=387} [2023-08-29 19:44:39,632 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 174 predicate places. [2023-08-29 19:44:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 387 transitions, 4552 flow [2023-08-29 19:44:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:39,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:39,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:44:39,633 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:39,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-29 19:44:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:39,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887046423] [2023-08-29 19:44:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:40,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887046423] [2023-08-29 19:44:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887046423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227783085] [2023-08-29 19:44:40,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:44:40,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:40,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:40,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:44:40,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 19:44:40,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 19:44:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-29 19:44:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:40,541 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:44:40,542 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 [2023-08-29 19:44:40,889 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 19 treesize of output 15 [2023-08-29 19:44:40,904 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:44:40,904 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 16 treesize of output 16 [2023-08-29 19:44:40,969 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 56 treesize of output 52 [2023-08-29 19:44:41,524 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 107 treesize of output 43 [2023-08-29 19:44:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:42,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:44:42,088 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-29 19:44:42,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:44:42,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 52 [2023-08-29 19:44:42,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:44:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227783085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:42,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-29 19:44:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497048758] [2023-08-29 19:44:42,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:42,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-29 19:44:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-29 19:44:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2268, Unknown=12, NotChecked=0, Total=2450 [2023-08-29 19:44:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-29 19:44:49,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 387 transitions, 4552 flow. Second operand has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:49,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:49,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-29 19:44:49,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:45:05,390 INFO L130 PetriNetUnfolder]: 9627/18985 cut-off events. [2023-08-29 19:45:05,390 INFO L131 PetriNetUnfolder]: For 67627/67627 co-relation queries the response was YES. [2023-08-29 19:45:05,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85363 conditions, 18985 events. 9627/18985 cut-off events. For 67627/67627 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 142030 event pairs, 1682 based on Foata normal form. 174/18861 useless extension candidates. Maximal degree in co-relation 85299. Up to 5781 conditions per place. [2023-08-29 19:45:05,697 INFO L137 encePairwiseOnDemand]: 305/327 looper letters, 571 selfloop transitions, 371 changer transitions 0/942 dead transitions. [2023-08-29 19:45:05,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 942 transitions, 10124 flow [2023-08-29 19:45:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-29 19:45:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-29 19:45:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6920 transitions. [2023-08-29 19:45:05,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28597404744193733 [2023-08-29 19:45:05,707 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6920 transitions. [2023-08-29 19:45:05,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6920 transitions. [2023-08-29 19:45:05,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:45:05,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6920 transitions. [2023-08-29 19:45:05,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 93.51351351351352) internal successors, (6920), 74 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:05,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:05,738 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:05,738 INFO L175 Difference]: Start difference. First operand has 222 places, 387 transitions, 4552 flow. Second operand 74 states and 6920 transitions. [2023-08-29 19:45:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 942 transitions, 10124 flow [2023-08-29 19:45:06,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 942 transitions, 9762 flow, removed 159 selfloop flow, removed 5 redundant places. [2023-08-29 19:45:06,590 INFO L231 Difference]: Finished difference. Result has 323 places, 560 transitions, 7368 flow [2023-08-29 19:45:06,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=7368, PETRI_PLACES=323, PETRI_TRANSITIONS=560} [2023-08-29 19:45:06,591 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 275 predicate places. [2023-08-29 19:45:06,591 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 560 transitions, 7368 flow [2023-08-29 19:45:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:06,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:45:06,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:45:06,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:45:06,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:45:06,793 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:45:06,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:45:06,793 INFO L85 PathProgramCache]: Analyzing trace with hash -681156031, now seen corresponding path program 2 times [2023-08-29 19:45:06,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:45:06,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301910851] [2023-08-29 19:45:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:45:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:45:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:45:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:45:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301910851] [2023-08-29 19:45:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301910851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:45:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483928808] [2023-08-29 19:45:07,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:45:07,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:45:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:45:07,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:45:07,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 19:45:07,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:45:07,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:45:07,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:45:07,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:45:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:45:07,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:45:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:45:07,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483928808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:45:07,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:45:07,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-08-29 19:45:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36268628] [2023-08-29 19:45:07,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:45:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:45:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:45:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:45:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:45:07,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 327 [2023-08-29 19:45:07,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 560 transitions, 7368 flow. Second operand has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:07,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:45:07,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 327 [2023-08-29 19:45:07,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:45:12,611 INFO L130 PetriNetUnfolder]: 10307/20387 cut-off events. [2023-08-29 19:45:12,611 INFO L131 PetriNetUnfolder]: For 94359/94359 co-relation queries the response was YES. [2023-08-29 19:45:12,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100823 conditions, 20387 events. 10307/20387 cut-off events. For 94359/94359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 155295 event pairs, 2939 based on Foata normal form. 158/20219 useless extension candidates. Maximal degree in co-relation 100727. Up to 5467 conditions per place. [2023-08-29 19:45:12,978 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 483 selfloop transitions, 315 changer transitions 0/798 dead transitions. [2023-08-29 19:45:12,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 798 transitions, 11456 flow [2023-08-29 19:45:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:45:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:45:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2536 transitions. [2023-08-29 19:45:12,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45619715776218744 [2023-08-29 19:45:12,983 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2536 transitions. [2023-08-29 19:45:12,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2536 transitions. [2023-08-29 19:45:12,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:45:12,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2536 transitions. [2023-08-29 19:45:12,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.1764705882353) internal successors, (2536), 17 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:12,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:12,991 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:12,991 INFO L175 Difference]: Start difference. First operand has 323 places, 560 transitions, 7368 flow. Second operand 17 states and 2536 transitions. [2023-08-29 19:45:12,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 798 transitions, 11456 flow [2023-08-29 19:45:13,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 798 transitions, 10269 flow, removed 367 selfloop flow, removed 17 redundant places. [2023-08-29 19:45:13,890 INFO L231 Difference]: Finished difference. Result has 320 places, 567 transitions, 7702 flow [2023-08-29 19:45:13,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7702, PETRI_PLACES=320, PETRI_TRANSITIONS=567} [2023-08-29 19:45:13,891 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 272 predicate places. [2023-08-29 19:45:13,891 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 567 transitions, 7702 flow [2023-08-29 19:45:13,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:13,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:45:13,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:45:13,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-29 19:45:14,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-29 19:45:14,092 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:45:14,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:45:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1752014428, now seen corresponding path program 2 times [2023-08-29 19:45:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:45:14,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54116200] [2023-08-29 19:45:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:14,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:45:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:45:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:45:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54116200] [2023-08-29 19:45:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54116200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:45:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79435139] [2023-08-29 19:45:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:45:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:45:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:45:14,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:45:14,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 19:45:15,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:45:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:45:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-29 19:45:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:45:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:45:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:45:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:45:15,047 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 [2023-08-29 19:45:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:15,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:45:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:15,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79435139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:45:15,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:45:15,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-29 19:45:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859028431] [2023-08-29 19:45:15,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:45:15,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-29 19:45:15,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:45:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-29 19:45:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2023-08-29 19:45:19,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-29 19:45:19,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 567 transitions, 7702 flow. Second operand has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:19,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:45:19,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-29 19:45:19,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:45:26,498 INFO L130 PetriNetUnfolder]: 12174/24096 cut-off events. [2023-08-29 19:45:26,498 INFO L131 PetriNetUnfolder]: For 99344/99344 co-relation queries the response was YES. [2023-08-29 19:45:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117101 conditions, 24096 events. 12174/24096 cut-off events. For 99344/99344 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 191141 event pairs, 3421 based on Foata normal form. 68/23885 useless extension candidates. Maximal degree in co-relation 117001. Up to 14966 conditions per place. [2023-08-29 19:45:26,943 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 764 selfloop transitions, 171 changer transitions 0/935 dead transitions. [2023-08-29 19:45:26,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 935 transitions, 13062 flow [2023-08-29 19:45:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-29 19:45:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-29 19:45:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3953 transitions. [2023-08-29 19:45:26,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685120742381104 [2023-08-29 19:45:26,946 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3953 transitions. [2023-08-29 19:45:26,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3953 transitions. [2023-08-29 19:45:26,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:45:26,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3953 transitions. [2023-08-29 19:45:26,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.31034482758622) internal successors, (3953), 29 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:26,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:26,959 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:26,959 INFO L175 Difference]: Start difference. First operand has 320 places, 567 transitions, 7702 flow. Second operand 29 states and 3953 transitions. [2023-08-29 19:45:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 935 transitions, 13062 flow [2023-08-29 19:45:27,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 935 transitions, 12780 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-08-29 19:45:27,775 INFO L231 Difference]: Finished difference. Result has 357 places, 656 transitions, 9503 flow [2023-08-29 19:45:27,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9503, PETRI_PLACES=357, PETRI_TRANSITIONS=656} [2023-08-29 19:45:27,776 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 309 predicate places. [2023-08-29 19:45:27,776 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 656 transitions, 9503 flow [2023-08-29 19:45:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:45:27,777 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:45:27,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:45:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 19:45:27,978 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:45:27,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:45:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2002287342, now seen corresponding path program 2 times [2023-08-29 19:45:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:45:27,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130468330] [2023-08-29 19:45:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:45:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:45:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-29 19:45:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:45:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130468330] [2023-08-29 19:45:28,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130468330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:45:28,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827346127] [2023-08-29 19:45:28,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:45:28,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:45:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:45:28,029 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:45:28,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 19:45:28,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 19:45:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:45:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 19:45:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:45:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-29 19:45:28,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:45:28,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827346127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:45:28,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:45:28,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-29 19:45:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512539145] [2023-08-29 19:45:28,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:45:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:45:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:45:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:45:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:45:28,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-29 19:45:28,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 656 transitions, 9503 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:28,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:45:28,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-29 19:45:28,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:45:34,542 INFO L130 PetriNetUnfolder]: 11163/22902 cut-off events. [2023-08-29 19:45:34,542 INFO L131 PetriNetUnfolder]: For 108606/108682 co-relation queries the response was YES. [2023-08-29 19:45:34,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113985 conditions, 22902 events. 11163/22902 cut-off events. For 108606/108682 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 187351 event pairs, 9218 based on Foata normal form. 85/22758 useless extension candidates. Maximal degree in co-relation 113873. Up to 21811 conditions per place. [2023-08-29 19:45:35,216 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 535 selfloop transitions, 1 changer transitions 1/644 dead transitions. [2023-08-29 19:45:35,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 644 transitions, 10480 flow [2023-08-29 19:45:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:45:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:45:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-29 19:45:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-29 19:45:35,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-29 19:45:35,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-29 19:45:35,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:45:35,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-29 19:45:35,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-29 19:45:35,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:35,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:35,220 INFO L175 Difference]: Start difference. First operand has 357 places, 656 transitions, 9503 flow. Second operand 3 states and 467 transitions. [2023-08-29 19:45:35,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 644 transitions, 10480 flow [2023-08-29 19:45:36,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 644 transitions, 10207 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-08-29 19:45:36,153 INFO L231 Difference]: Finished difference. Result has 340 places, 643 transitions, 9132 flow [2023-08-29 19:45:36,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9132, PETRI_PLACES=340, PETRI_TRANSITIONS=643} [2023-08-29 19:45:36,154 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 292 predicate places. [2023-08-29 19:45:36,154 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 643 transitions, 9132 flow [2023-08-29 19:45:36,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:36,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:45:36,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:45:36,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-29 19:45:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 19:45:36,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:45:36,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:45:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-29 19:45:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:45:36,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098652559] [2023-08-29 19:45:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:36,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:45:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:45:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:37,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:45:37,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098652559] [2023-08-29 19:45:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098652559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:45:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981206837] [2023-08-29 19:45:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:45:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:45:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:45:37,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:45:37,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 19:45:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:45:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-29 19:45:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:45:38,129 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 15 treesize of output 11 [2023-08-29 19:45:38,537 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 45 treesize of output 32 [2023-08-29 19:45:39,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:45:39,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-29 19:45:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:39,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:45:40,399 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 57 treesize of output 48 [2023-08-29 19:45:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:45:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981206837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:45:40,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:45:40,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 63 [2023-08-29 19:45:40,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506041678] [2023-08-29 19:45:40,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:45:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-29 19:45:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:45:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-29 19:45:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3750, Unknown=0, NotChecked=0, Total=4160 [2023-08-29 19:45:46,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:45:49,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:45:51,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:45:53,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 327 [2023-08-29 19:45:53,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 643 transitions, 9132 flow. Second operand has 65 states, 65 states have (on average 119.66153846153846) internal successors, (7778), 65 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:45:53,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:45:53,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 327 [2023-08-29 19:45:53,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:46:03,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:10,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:12,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:33,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:35,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:37,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:41,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:46:56,104 INFO L130 PetriNetUnfolder]: 20942/40778 cut-off events. [2023-08-29 19:46:56,104 INFO L131 PetriNetUnfolder]: For 183879/183879 co-relation queries the response was YES. [2023-08-29 19:46:57,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201537 conditions, 40778 events. 20942/40778 cut-off events. For 183879/183879 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 338854 event pairs, 4143 based on Foata normal form. 224/40729 useless extension candidates. Maximal degree in co-relation 201424. Up to 15840 conditions per place. [2023-08-29 19:46:57,115 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 973 selfloop transitions, 761 changer transitions 174/1908 dead transitions. [2023-08-29 19:46:57,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1908 transitions, 25957 flow [2023-08-29 19:46:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-08-29 19:46:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2023-08-29 19:46:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 18252 transitions. [2023-08-29 19:46:57,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771386064964047 [2023-08-29 19:46:57,132 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 18252 transitions. [2023-08-29 19:46:57,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 18252 transitions. [2023-08-29 19:46:57,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:46:57,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 18252 transitions. [2023-08-29 19:46:57,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 123.32432432432432) internal successors, (18252), 148 states have internal predecessors, (18252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:46:57,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 327.0) internal successors, (48723), 149 states have internal predecessors, (48723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:46:57,197 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 327.0) internal successors, (48723), 149 states have internal predecessors, (48723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:46:57,198 INFO L175 Difference]: Start difference. First operand has 340 places, 643 transitions, 9132 flow. Second operand 148 states and 18252 transitions. [2023-08-29 19:46:57,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1908 transitions, 25957 flow [2023-08-29 19:46:58,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1908 transitions, 25956 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:46:58,981 INFO L231 Difference]: Finished difference. Result has 520 places, 1254 transitions, 20403 flow [2023-08-29 19:46:58,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=20403, PETRI_PLACES=520, PETRI_TRANSITIONS=1254} [2023-08-29 19:46:58,982 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 472 predicate places. [2023-08-29 19:46:58,982 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1254 transitions, 20403 flow [2023-08-29 19:46:58,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 119.66153846153846) internal successors, (7778), 65 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:46:58,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:46:58,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:46:58,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 19:46:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-29 19:46:59,189 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:46:59,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:46:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-29 19:46:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:46:59,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641717560] [2023-08-29 19:46:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:46:59,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:46:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:47:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:47:00,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:47:00,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641717560] [2023-08-29 19:47:00,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641717560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:47:00,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562325519] [2023-08-29 19:47:00,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:47:00,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:47:00,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:47:00,714 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:47:00,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 19:47:00,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:47:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:47:00,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 19:47:00,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:47:00,877 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:47:00,877 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 15 treesize of output 15 [2023-08-29 19:47:01,172 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 15 treesize of output 11 [2023-08-29 19:47:01,247 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 40 treesize of output 36 [2023-08-29 19:47:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:47:01,709 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 49 treesize of output 36 [2023-08-29 19:47:02,374 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 75 treesize of output 43 [2023-08-29 19:47:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:47:02,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:47:03,372 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1028 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1028) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-29 19:47:03,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:47:03,379 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-29 19:47:03,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:47:03,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 52 [2023-08-29 19:47:03,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:47:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:47:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562325519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:47:03,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:47:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 20] total 65 [2023-08-29 19:47:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485356657] [2023-08-29 19:47:03,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:47:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-08-29 19:47:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:47:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-08-29 19:47:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4053, Unknown=1, NotChecked=128, Total=4422 [2023-08-29 19:47:04,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-29 19:47:04,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1254 transitions, 20403 flow. Second operand has 67 states, 67 states have (on average 88.61194029850746) internal successors, (5937), 67 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:47:04,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:47:04,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-29 19:47:04,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:47:59,531 INFO L130 PetriNetUnfolder]: 24682/48442 cut-off events. [2023-08-29 19:47:59,531 INFO L131 PetriNetUnfolder]: For 326479/326479 co-relation queries the response was YES. [2023-08-29 19:48:01,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263083 conditions, 48442 events. 24682/48442 cut-off events. For 326479/326479 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 413817 event pairs, 2528 based on Foata normal form. 702/48763 useless extension candidates. Maximal degree in co-relation 262935. Up to 9396 conditions per place. [2023-08-29 19:48:01,180 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 568 selfloop transitions, 1858 changer transitions 104/2530 dead transitions. [2023-08-29 19:48:01,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 2530 transitions, 39604 flow [2023-08-29 19:48:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-08-29 19:48:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2023-08-29 19:48:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 14530 transitions. [2023-08-29 19:48:01,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28122943521851895 [2023-08-29 19:48:01,195 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 14530 transitions. [2023-08-29 19:48:01,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 14530 transitions. [2023-08-29 19:48:01,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:01,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 14530 transitions. [2023-08-29 19:48:01,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 91.9620253164557) internal successors, (14530), 158 states have internal predecessors, (14530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:01,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 327.0) internal successors, (51993), 159 states have internal predecessors, (51993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:01,254 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 327.0) internal successors, (51993), 159 states have internal predecessors, (51993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:01,254 INFO L175 Difference]: Start difference. First operand has 520 places, 1254 transitions, 20403 flow. Second operand 158 states and 14530 transitions. [2023-08-29 19:48:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 2530 transitions, 39604 flow [2023-08-29 19:48:05,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 2530 transitions, 37200 flow, removed 999 selfloop flow, removed 23 redundant places. [2023-08-29 19:48:05,283 INFO L231 Difference]: Finished difference. Result has 646 places, 1976 transitions, 33622 flow [2023-08-29 19:48:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=15446, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=33622, PETRI_PLACES=646, PETRI_TRANSITIONS=1976} [2023-08-29 19:48:05,285 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 598 predicate places. [2023-08-29 19:48:05,285 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1976 transitions, 33622 flow [2023-08-29 19:48:05,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 88.61194029850746) internal successors, (5937), 67 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:05,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:05,286 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-29 19:48:05,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 19:48:05,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 19:48:05,488 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:48:05,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash 619878933, now seen corresponding path program 2 times [2023-08-29 19:48:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:05,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145647670] [2023-08-29 19:48:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:05,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145647670] [2023-08-29 19:48:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145647670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:48:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397826937] [2023-08-29 19:48:05,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:48:05,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:48:05,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:48:05,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:48:05,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 19:48:06,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:48:06,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:48:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 19:48:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:48:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:06,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:48:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:48:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397826937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:48:06,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:48:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 29 [2023-08-29 19:48:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169092515] [2023-08-29 19:48:06,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:48:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 19:48:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 19:48:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2023-08-29 19:48:06,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-29 19:48:06,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1976 transitions, 33622 flow. Second operand has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:06,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:06,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-29 19:48:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:48:35,452 INFO L130 PetriNetUnfolder]: 27636/54278 cut-off events. [2023-08-29 19:48:35,453 INFO L131 PetriNetUnfolder]: For 357663/357663 co-relation queries the response was YES. [2023-08-29 19:48:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312975 conditions, 54278 events. 27636/54278 cut-off events. For 357663/357663 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 456905 event pairs, 8972 based on Foata normal form. 282/54097 useless extension candidates. Maximal degree in co-relation 312825. Up to 30260 conditions per place. [2023-08-29 19:48:37,380 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 2124 selfloop transitions, 637 changer transitions 9/2770 dead transitions. [2023-08-29 19:48:37,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 2770 transitions, 50547 flow [2023-08-29 19:48:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 19:48:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 19:48:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4767 transitions. [2023-08-29 19:48:37,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470257472625037 [2023-08-29 19:48:37,383 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4767 transitions. [2023-08-29 19:48:37,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4767 transitions. [2023-08-29 19:48:37,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:48:37,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4767 transitions. [2023-08-29 19:48:37,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 153.7741935483871) internal successors, (4767), 31 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:37,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:37,395 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:37,395 INFO L175 Difference]: Start difference. First operand has 646 places, 1976 transitions, 33622 flow. Second operand 31 states and 4767 transitions. [2023-08-29 19:48:37,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 2770 transitions, 50547 flow [2023-08-29 19:48:43,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 2770 transitions, 45875 flow, removed 1860 selfloop flow, removed 35 redundant places. [2023-08-29 19:48:43,900 INFO L231 Difference]: Finished difference. Result has 653 places, 2117 transitions, 34737 flow [2023-08-29 19:48:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=29632, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=34737, PETRI_PLACES=653, PETRI_TRANSITIONS=2117} [2023-08-29 19:48:43,903 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 605 predicate places. [2023-08-29 19:48:43,904 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2117 transitions, 34737 flow [2023-08-29 19:48:43,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:43,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:48:43,905 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:48:43,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-29 19:48:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:48:44,112 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:48:44,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:48:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1799382781, now seen corresponding path program 3 times [2023-08-29 19:48:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:48:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126488652] [2023-08-29 19:48:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:48:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:48:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:48:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 19:48:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:48:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126488652] [2023-08-29 19:48:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126488652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:48:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597247522] [2023-08-29 19:48:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:48:44,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:48:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:48:44,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:48:44,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 19:48:44,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-29 19:48:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:48:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 19:48:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:48:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 19:48:44,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:48:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 19:48:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597247522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:48:44,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:48:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-29 19:48:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495207937] [2023-08-29 19:48:44,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:48:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:48:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:48:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:48:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:48:44,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 327 [2023-08-29 19:48:45,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2117 transitions, 34737 flow. Second operand has 22 states, 22 states have (on average 143.13636363636363) internal successors, (3149), 22 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:48:45,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:48:45,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 327 [2023-08-29 19:48:45,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:49:20,898 INFO L130 PetriNetUnfolder]: 34087/66875 cut-off events. [2023-08-29 19:49:20,898 INFO L131 PetriNetUnfolder]: For 395636/395636 co-relation queries the response was YES. [2023-08-29 19:49:23,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370518 conditions, 66875 events. 34087/66875 cut-off events. For 395636/395636 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 580417 event pairs, 9109 based on Foata normal form. 206/66043 useless extension candidates. Maximal degree in co-relation 370370. Up to 17221 conditions per place. [2023-08-29 19:49:23,641 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 2146 selfloop transitions, 1000 changer transitions 9/3155 dead transitions. [2023-08-29 19:49:23,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 3155 transitions, 55065 flow [2023-08-29 19:49:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-29 19:49:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-29 19:49:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4030 transitions. [2023-08-29 19:49:23,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564503341261751 [2023-08-29 19:49:23,645 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4030 transitions. [2023-08-29 19:49:23,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4030 transitions. [2023-08-29 19:49:23,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:49:23,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4030 transitions. [2023-08-29 19:49:23,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 149.25925925925927) internal successors, (4030), 27 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:23,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:23,652 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:23,652 INFO L175 Difference]: Start difference. First operand has 653 places, 2117 transitions, 34737 flow. Second operand 27 states and 4030 transitions. [2023-08-29 19:49:23,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 3155 transitions, 55065 flow [2023-08-29 19:49:30,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3155 transitions, 53859 flow, removed 246 selfloop flow, removed 14 redundant places. [2023-08-29 19:49:30,893 INFO L231 Difference]: Finished difference. Result has 675 places, 2316 transitions, 40082 flow [2023-08-29 19:49:30,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=33387, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=838, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=40082, PETRI_PLACES=675, PETRI_TRANSITIONS=2316} [2023-08-29 19:49:30,896 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 627 predicate places. [2023-08-29 19:49:30,896 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 2316 transitions, 40082 flow [2023-08-29 19:49:30,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 143.13636363636363) internal successors, (3149), 22 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:30,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:49:30,897 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:49:30,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-29 19:49:31,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:31,105 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:49:31,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:49:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1799384336, now seen corresponding path program 3 times [2023-08-29 19:49:31,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:49:31,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607622124] [2023-08-29 19:49:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:49:31,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:49:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:49:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 19:49:32,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:49:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607622124] [2023-08-29 19:49:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607622124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:49:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478224669] [2023-08-29 19:49:32,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:49:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:49:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:49:32,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:49:32,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 19:49:32,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:49:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:49:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-29 19:49:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:49:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:49:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:49:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:49:32,467 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 [2023-08-29 19:49:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-29 19:49:33,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:49:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-29 19:49:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478224669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:49:34,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:49:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 9] total 42 [2023-08-29 19:49:34,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765915614] [2023-08-29 19:49:34,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:49:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-29 19:49:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:49:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-29 19:49:34,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1745, Unknown=0, NotChecked=0, Total=1892 [2023-08-29 19:49:40,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2023-08-29 19:49:40,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 2316 transitions, 40082 flow. Second operand has 44 states, 44 states have (on average 127.36363636363636) internal successors, (5604), 44 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:49:40,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:49:40,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2023-08-29 19:49:40,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:23,213 INFO L130 PetriNetUnfolder]: 33595/66533 cut-off events. [2023-08-29 19:50:23,213 INFO L131 PetriNetUnfolder]: For 450864/450864 co-relation queries the response was YES. [2023-08-29 19:50:25,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367960 conditions, 66533 events. 33595/66533 cut-off events. For 450864/450864 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 576822 event pairs, 9726 based on Foata normal form. 1315/67737 useless extension candidates. Maximal degree in co-relation 367802. Up to 19092 conditions per place. [2023-08-29 19:50:25,836 INFO L137 encePairwiseOnDemand]: 314/327 looper letters, 791 selfloop transitions, 1761 changer transitions 6/2558 dead transitions. [2023-08-29 19:50:25,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2558 transitions, 46406 flow [2023-08-29 19:50:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-29 19:50:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-29 19:50:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 6598 transitions. [2023-08-29 19:50:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035474006116208 [2023-08-29 19:50:25,840 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 6598 transitions. [2023-08-29 19:50:25,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 6598 transitions. [2023-08-29 19:50:25,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:25,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 6598 transitions. [2023-08-29 19:50:25,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 131.96) internal successors, (6598), 50 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:25,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 327.0) internal successors, (16677), 51 states have internal predecessors, (16677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:25,852 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 327.0) internal successors, (16677), 51 states have internal predecessors, (16677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:25,852 INFO L175 Difference]: Start difference. First operand has 675 places, 2316 transitions, 40082 flow. Second operand 50 states and 6598 transitions. [2023-08-29 19:50:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2558 transitions, 46406 flow [2023-08-29 19:50:33,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 2558 transitions, 44606 flow, removed 368 selfloop flow, removed 15 redundant places. [2023-08-29 19:50:33,641 INFO L231 Difference]: Finished difference. Result has 710 places, 2276 transitions, 40997 flow [2023-08-29 19:50:33,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=34466, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=40997, PETRI_PLACES=710, PETRI_TRANSITIONS=2276} [2023-08-29 19:50:33,642 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 662 predicate places. [2023-08-29 19:50:33,642 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 2276 transitions, 40997 flow [2023-08-29 19:50:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 127.36363636363636) internal successors, (5604), 44 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:33,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:33,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 19:50:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:50:33,844 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:50:33,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 294932578, now seen corresponding path program 3 times [2023-08-29 19:50:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:33,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108474503] [2023-08-29 19:50:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108474503] [2023-08-29 19:50:35,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108474503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:50:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202867841] [2023-08-29 19:50:35,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:50:35,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:50:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:50:35,118 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:50:35,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 19:50:35,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 19:50:35,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:50:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-29 19:50:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:50:35,534 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 19 treesize of output 15 [2023-08-29 19:50:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:35,880 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 69 treesize of output 41 [2023-08-29 19:50:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:36,247 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 69 treesize of output 41 [2023-08-29 19:50:36,880 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 107 treesize of output 43 [2023-08-29 19:50:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:36,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:50:39,629 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 54 treesize of output 46 [2023-08-29 19:50:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202867841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:50:39,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:50:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 74 [2023-08-29 19:50:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945164441] [2023-08-29 19:50:39,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:50:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-08-29 19:50:39,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-08-29 19:50:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5268, Unknown=0, NotChecked=0, Total=5550 [2023-08-29 19:50:42,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:50:46,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:50:52,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:50:58,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:51:08,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2023-08-29 19:51:08,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 2276 transitions, 40997 flow. Second operand has 75 states, 75 states have (on average 126.96) internal successors, (9522), 75 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:51:08,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:51:08,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2023-08-29 19:51:08,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:52:39,943 INFO L130 PetriNetUnfolder]: 50984/101150 cut-off events. [2023-08-29 19:52:39,943 INFO L131 PetriNetUnfolder]: For 569104/569104 co-relation queries the response was YES. [2023-08-29 19:52:43,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570665 conditions, 101150 events. 50984/101150 cut-off events. For 569104/569104 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 925694 event pairs, 3888 based on Foata normal form. 54/100969 useless extension candidates. Maximal degree in co-relation 570508. Up to 19532 conditions per place. [2023-08-29 19:52:43,858 INFO L137 encePairwiseOnDemand]: 309/327 looper letters, 515 selfloop transitions, 3487 changer transitions 0/4024 dead transitions. [2023-08-29 19:52:43,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4024 transitions, 76576 flow [2023-08-29 19:52:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-08-29 19:52:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-08-29 19:52:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 10672 transitions. [2023-08-29 19:52:43,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39800104423062577 [2023-08-29 19:52:43,864 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 10672 transitions. [2023-08-29 19:52:43,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 10672 transitions. [2023-08-29 19:52:43,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:52:43,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 10672 transitions. [2023-08-29 19:52:43,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 130.14634146341464) internal successors, (10672), 82 states have internal predecessors, (10672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:43,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 327.0) internal successors, (27141), 83 states have internal predecessors, (27141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:43,893 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 327.0) internal successors, (27141), 83 states have internal predecessors, (27141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:43,894 INFO L175 Difference]: Start difference. First operand has 710 places, 2276 transitions, 40997 flow. Second operand 82 states and 10672 transitions. [2023-08-29 19:52:43,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4024 transitions, 76576 flow [2023-08-29 19:52:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 4024 transitions, 74890 flow, removed 336 selfloop flow, removed 14 redundant places. [2023-08-29 19:52:59,808 INFO L231 Difference]: Finished difference. Result has 784 places, 3701 transitions, 73263 flow [2023-08-29 19:52:59,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=40132, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=73263, PETRI_PLACES=784, PETRI_TRANSITIONS=3701} [2023-08-29 19:52:59,810 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 736 predicate places. [2023-08-29 19:52:59,811 INFO L495 AbstractCegarLoop]: Abstraction has has 784 places, 3701 transitions, 73263 flow [2023-08-29 19:52:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 126.96) internal successors, (9522), 75 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:59,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:52:59,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:52:59,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 19:53:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-29 19:53:00,013 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:53:00,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash -74002654, now seen corresponding path program 4 times [2023-08-29 19:53:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127894662] [2023-08-29 19:53:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:03,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127894662] [2023-08-29 19:53:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127894662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:53:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955129136] [2023-08-29 19:53:03,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:53:03,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:53:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:53:03,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:53:03,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 19:53:03,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 19:53:03,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:53:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 100 conjunts are in the unsatisfiable core [2023-08-29 19:53:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:53:03,247 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:53:03,248 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 15 treesize of output 15 [2023-08-29 19:53:03,581 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 19 treesize of output 15 [2023-08-29 19:53:03,744 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 57 treesize of output 53 [2023-08-29 19:53:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:53:04,715 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 66 treesize of output 41 [2023-08-29 19:53:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:53:05,632 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 66 treesize of output 41 [2023-08-29 19:53:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:53:07,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 44 [2023-08-29 19:53:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:07,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:53:10,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:53:10,355 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-29 19:53:10,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:53:10,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 52 [2023-08-29 19:53:10,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-29 19:53:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955129136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:53:10,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:53:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 26] total 87 [2023-08-29 19:53:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421601650] [2023-08-29 19:53:10,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:53:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-08-29 19:53:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-08-29 19:53:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=7433, Unknown=10, NotChecked=0, Total=7832 [2023-08-29 19:53:14,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:17,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:19,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:22,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:26,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:29,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:31,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:34,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:36,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:53:37,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-29 19:53:37,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 3701 transitions, 73263 flow. Second operand has 89 states, 89 states have (on average 88.71910112359551) internal successors, (7896), 89 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:37,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:37,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-29 19:53:37,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:54:28,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:54:48,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:05,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:38,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:40,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15