./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-1.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-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --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 19:43:39,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:43:39,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:43:39,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:43:39,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:43:39,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:43:39,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:43:39,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:43:39,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:43:39,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:43:39,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:43:39,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:43:39,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:43:39,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:43:39,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:43:39,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:43:39,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:43:39,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:43:39,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:43:39,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:43:39,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:43:39,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:43:39,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:43:39,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:43:39,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:43:39,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:43:39,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:43:39,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:43:39,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:43:39,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:43:39,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:43:39,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:43:39,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:43:39,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:43:39,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:43:39,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:43:39,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:43:39,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:43:39,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:43:39,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:43:39,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:43:39,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:43:39,697 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:43:39,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:43:39,697 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:43:39,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:43:39,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:43:39,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:43:39,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:43:39,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:43:39,698 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:43:39,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:43:39,699 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:43:39,700 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:43:39,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:39,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:43:39,701 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:43:39,702 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:43:39,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:43:39,702 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:43:39,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:43:39,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:43:39,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:43:39,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:43:39,934 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:43:39,934 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:43:39,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-29 19:43:40,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:43:41,067 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:43:41,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-29 19:43:41,082 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b45b9ae8/26c5a1b60ed84a2b8bcad037eeec1c13/FLAG9ed4b765b [2023-08-29 19:43:41,371 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b45b9ae8/26c5a1b60ed84a2b8bcad037eeec1c13 [2023-08-29 19:43:41,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:43:41,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:43:41,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:41,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:43:41,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:43:41,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fabda94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41, skipping insertion in model container [2023-08-29 19:43:41,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:43:41,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:43:41,726 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-1.i[41530,41543] [2023-08-29 19:43:41,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:41,765 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:43:41,794 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-1.i[41530,41543] [2023-08-29 19:43:41,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:41,867 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:43:41,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41 WrapperNode [2023-08-29 19:43:41,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:41,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:41,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:43:41,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:43:41,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,924 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-29 19:43:41,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:41,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:43:41,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:43:41,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:43:41,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,960 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:43:41,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:43:41,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:43:41,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:43:41,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (1/1) ... [2023-08-29 19:43:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:41,998 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 19:43:42,004 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 19:43:42,030 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:43:42,030 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:43:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:43:42,031 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:43:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:43:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:43:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:43:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:43:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:43:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:43:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:43:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:43:42,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:43:42,033 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 19:43:42,126 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:43:42,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:43:42,345 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:43:42,357 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:43:42,357 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:43:42,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:42 BoogieIcfgContainer [2023-08-29 19:43:42,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:43:42,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:43:42,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:43:42,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:43:42,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:43:41" (1/3) ... [2023-08-29 19:43:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126ea6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:42, skipping insertion in model container [2023-08-29 19:43:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:41" (2/3) ... [2023-08-29 19:43:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126ea6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:42, skipping insertion in model container [2023-08-29 19:43:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:42" (3/3) ... [2023-08-29 19:43:42,366 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-08-29 19:43:42,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:43:42,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:43:42,377 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:43:42,482 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:43:42,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:43:42,549 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-29 19:43:42,550 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:42,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 444 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:43:42,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:43:42,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-29 19:43:42,563 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:43:42,575 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:43:42,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:43:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-29 19:43:42,613 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-29 19:43:42,614 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:42,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:43:42,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-29 19:43:46,072 INFO L134 LiptonReduction]: Checked pairs total: 13285 [2023-08-29 19:43:46,072 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-29 19:43:46,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:43:46,095 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;@1e26a544, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:43:46,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:43:46,097 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:43:46,097 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:43:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:46,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:43:46,098 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 19:43:46,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 714, now seen corresponding path program 1 times [2023-08-29 19:43:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:46,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379508999] [2023-08-29 19:43:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:46,191 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 19:43:46,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379508999] [2023-08-29 19:43:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379508999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:43:46,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802853309] [2023-08-29 19:43:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:43:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:43:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:43:46,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 344 [2023-08-29 19:43:46,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:46,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:46,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 344 [2023-08-29 19:43:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:46,421 INFO L130 PetriNetUnfolder]: 1353/2128 cut-off events. [2023-08-29 19:43:46,421 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2023-08-29 19:43:46,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 2128 events. 1353/2128 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9964 event pairs, 1085 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 4000. Up to 2081 conditions per place. [2023-08-29 19:43:46,430 INFO L137 encePairwiseOnDemand]: 342/344 looper letters, 43 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:43:46,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 188 flow [2023-08-29 19:43:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:43:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:43:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 371 transitions. [2023-08-29 19:43:46,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392441860465116 [2023-08-29 19:43:46,440 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 371 transitions. [2023-08-29 19:43:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 371 transitions. [2023-08-29 19:43:46,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:46,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 371 transitions. [2023-08-29 19:43:46,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 19:43:46,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 19:43:46,449 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 19:43:46,450 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 371 transitions. [2023-08-29 19:43:46,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 188 flow [2023-08-29 19:43:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:46,453 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:43:46,457 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:46,457 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:46,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:46,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:43:46,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:46,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 700714, now seen corresponding path program 1 times [2023-08-29 19:43:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:46,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728930715] [2023-08-29 19:43:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:46,552 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 19:43:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728930715] [2023-08-29 19:43:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728930715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:46,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:46,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:46,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194298550] [2023-08-29 19:43:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:46,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 344 [2023-08-29 19:43:46,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:46,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:46,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 344 [2023-08-29 19:43:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:46,722 INFO L130 PetriNetUnfolder]: 1325/2074 cut-off events. [2023-08-29 19:43:46,722 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:46,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 2074 events. 1325/2074 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9645 event pairs, 1062 based on Foata normal form. 0/1179 useless extension candidates. Maximal degree in co-relation 4114. Up to 2026 conditions per place. [2023-08-29 19:43:46,729 INFO L137 encePairwiseOnDemand]: 340/344 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:43:46,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 172 flow [2023-08-29 19:43:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-29 19:43:46,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893410852713178 [2023-08-29 19:43:46,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-29 19:43:46,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-29 19:43:46,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:46,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-29 19:43:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 19:43:46,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:46,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:46,740 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 505 transitions. [2023-08-29 19:43:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 172 flow [2023-08-29 19:43:46,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:46,741 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:46,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:43:46,742 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:46,742 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:46,742 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 19:43:46,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:46,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:46,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:43:46,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:46,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 700713, now seen corresponding path program 1 times [2023-08-29 19:43:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734691878] [2023-08-29 19:43:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:46,823 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 19:43:46,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:46,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734691878] [2023-08-29 19:43:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734691878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:46,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841362832] [2023-08-29 19:43:46,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:46,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:46,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 344 [2023-08-29 19:43:46,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:46,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:46,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 344 [2023-08-29 19:43:46,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:46,964 INFO L130 PetriNetUnfolder]: 1297/2020 cut-off events. [2023-08-29 19:43:46,965 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:46,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 2020 events. 1297/2020 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9277 event pairs, 1039 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 4009. Up to 1973 conditions per place. [2023-08-29 19:43:46,984 INFO L137 encePairwiseOnDemand]: 340/344 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:43:46,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 168 flow [2023-08-29 19:43:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-29 19:43:46,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499031007751938 [2023-08-29 19:43:46,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-29 19:43:46,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-29 19:43:46,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:46,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-29 19:43:46,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 19:43:46,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:46,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:46,989 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 515 transitions. [2023-08-29 19:43:46,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 168 flow [2023-08-29 19:43:46,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:46,990 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:46,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:43:46,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:43:46,991 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:46,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:46,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:46,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:43:46,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:46,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 673400630, now seen corresponding path program 1 times [2023-08-29 19:43:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:46,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931288689] [2023-08-29 19:43:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:47,055 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 19:43:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931288689] [2023-08-29 19:43:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931288689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:47,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378865187] [2023-08-29 19:43:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:47,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:43:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:43:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:43:47,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 344 [2023-08-29 19:43:47,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:47,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 344 [2023-08-29 19:43:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:47,202 INFO L130 PetriNetUnfolder]: 948/1504 cut-off events. [2023-08-29 19:43:47,202 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 1504 events. 948/1504 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6626 event pairs, 752 based on Foata normal form. 0/932 useless extension candidates. Maximal degree in co-relation 2988. Up to 1468 conditions per place. [2023-08-29 19:43:47,206 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:43:47,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-29 19:43:47,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2023-08-29 19:43:47,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-29 19:43:47,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-29 19:43:47,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:47,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-29 19:43:47,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:47,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:47,212 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 489 transitions. [2023-08-29 19:43:47,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:47,212 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 19:43:47,213 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:47,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, 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 19:43:47,213 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:43:47,214 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:47,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:47,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:43:47,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:47,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 673400631, now seen corresponding path program 1 times [2023-08-29 19:43:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872021113] [2023-08-29 19:43:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:47,275 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 19:43:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872021113] [2023-08-29 19:43:47,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872021113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:47,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:47,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753949699] [2023-08-29 19:43:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:43:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:43:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:43:47,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 344 [2023-08-29 19:43:47,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 19:43:47,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:47,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 344 [2023-08-29 19:43:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:47,389 INFO L130 PetriNetUnfolder]: 599/988 cut-off events. [2023-08-29 19:43:47,389 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:47,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 988 events. 599/988 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4186 event pairs, 465 based on Foata normal form. 0/704 useless extension candidates. Maximal degree in co-relation 1967. Up to 963 conditions per place. [2023-08-29 19:43:47,392 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:43:47,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-29 19:43:47,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903100775193798 [2023-08-29 19:43:47,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-29 19:43:47,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-29 19:43:47,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:47,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-29 19:43:47,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:47,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:47,397 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 506 transitions. [2023-08-29 19:43:47,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:47,397 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 19:43:47,398 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:47,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, 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 19:43:47,399 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:43:47,399 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 19:43:47,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:47,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:43:47,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:47,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash -598751102, now seen corresponding path program 1 times [2023-08-29 19:43:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905626577] [2023-08-29 19:43:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:47,618 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 19:43:47,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:47,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905626577] [2023-08-29 19:43:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905626577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:47,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690926806] [2023-08-29 19:43:47,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:47,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 344 [2023-08-29 19:43:47,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:47,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 344 [2023-08-29 19:43:47,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:47,978 INFO L130 PetriNetUnfolder]: 880/1467 cut-off events. [2023-08-29 19:43:47,978 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 19:43:47,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 1467 events. 880/1467 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6592 event pairs, 108 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 2911. Up to 992 conditions per place. [2023-08-29 19:43:47,983 INFO L137 encePairwiseOnDemand]: 337/344 looper letters, 84 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2023-08-29 19:43:47,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 93 transitions, 383 flow [2023-08-29 19:43:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-08-29 19:43:47,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075581395348837 [2023-08-29 19:43:47,985 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-08-29 19:43:47,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-08-29 19:43:47,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:47,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-08-29 19:43:47,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states 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 19:43:47,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 19:43:47,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 19:43:47,990 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 5 states and 873 transitions. [2023-08-29 19:43:47,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 93 transitions, 383 flow [2023-08-29 19:43:47,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 93 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:47,992 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 129 flow [2023-08-29 19:43:47,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, 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=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-29 19:43:47,993 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-29 19:43:47,993 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 129 flow [2023-08-29 19:43:47,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:47,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:47,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:43:47,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:47,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash -598751103, now seen corresponding path program 1 times [2023-08-29 19:43:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639291455] [2023-08-29 19:43:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:48,060 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 19:43:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639291455] [2023-08-29 19:43:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639291455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:48,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:48,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:48,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604838252] [2023-08-29 19:43:48,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:48,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:48,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 344 [2023-08-29 19:43:48,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 19:43:48,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:48,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 344 [2023-08-29 19:43:48,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:48,286 INFO L130 PetriNetUnfolder]: 911/1525 cut-off events. [2023-08-29 19:43:48,286 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-08-29 19:43:48,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3374 conditions, 1525 events. 911/1525 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7030 event pairs, 226 based on Foata normal form. 0/1271 useless extension candidates. Maximal degree in co-relation 3367. Up to 921 conditions per place. [2023-08-29 19:43:48,292 INFO L137 encePairwiseOnDemand]: 338/344 looper letters, 75 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2023-08-29 19:43:48,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 86 transitions, 389 flow [2023-08-29 19:43:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 854 transitions. [2023-08-29 19:43:48,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965116279069767 [2023-08-29 19:43:48,294 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 854 transitions. [2023-08-29 19:43:48,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 854 transitions. [2023-08-29 19:43:48,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:48,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 854 transitions. [2023-08-29 19:43:48,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.8) internal successors, (854), 5 states have internal predecessors, (854), 0 states have call successors, (0), 0 states 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 19:43:48,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 19:43:48,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 19:43:48,298 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 129 flow. Second operand 5 states and 854 transitions. [2023-08-29 19:43:48,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 86 transitions, 389 flow [2023-08-29 19:43:48,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 389 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:48,300 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 151 flow [2023-08-29 19:43:48,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-29 19:43:48,301 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-29 19:43:48,301 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 151 flow [2023-08-29 19:43:48,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 19:43:48,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:48,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:43:48,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:48,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1267951768, now seen corresponding path program 1 times [2023-08-29 19:43:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:48,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083701557] [2023-08-29 19:43:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:48,333 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 19:43:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083701557] [2023-08-29 19:43:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083701557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:48,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578300086] [2023-08-29 19:43:48,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:48,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 344 [2023-08-29 19:43:48,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:48,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 344 [2023-08-29 19:43:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:48,429 INFO L130 PetriNetUnfolder]: 643/1084 cut-off events. [2023-08-29 19:43:48,429 INFO L131 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2023-08-29 19:43:48,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1084 events. 643/1084 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4245 event pairs, 285 based on Foata normal form. 20/906 useless extension candidates. Maximal degree in co-relation 2486. Up to 827 conditions per place. [2023-08-29 19:43:48,433 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 53 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-29 19:43:48,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 273 flow [2023-08-29 19:43:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-29 19:43:48,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2023-08-29 19:43:48,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-29 19:43:48,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-29 19:43:48,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:48,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-29 19:43:48,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 19:43:48,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,438 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 151 flow. Second operand 3 states and 536 transitions. [2023-08-29 19:43:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 273 flow [2023-08-29 19:43:48,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 255 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-29 19:43:48,442 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 124 flow [2023-08-29 19:43:48,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-29 19:43:48,444 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-08-29 19:43:48,444 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 124 flow [2023-08-29 19:43:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:48,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:43:48,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:48,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash 582338464, now seen corresponding path program 1 times [2023-08-29 19:43:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:48,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403176765] [2023-08-29 19:43:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403176765] [2023-08-29 19:43:48,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403176765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:48,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:48,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690073680] [2023-08-29 19:43:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:48,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-29 19:43:48,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:48,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-29 19:43:48,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:48,580 INFO L130 PetriNetUnfolder]: 674/1131 cut-off events. [2023-08-29 19:43:48,580 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-29 19:43:48,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1131 events. 674/1131 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4456 event pairs, 477 based on Foata normal form. 38/1001 useless extension candidates. Maximal degree in co-relation 2572. Up to 1005 conditions per place. [2023-08-29 19:43:48,584 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 56 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-29 19:43:48,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 287 flow [2023-08-29 19:43:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-29 19:43:48,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164728682170543 [2023-08-29 19:43:48,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-29 19:43:48,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-29 19:43:48,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:48,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-29 19:43:48,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,589 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 124 flow. Second operand 3 states and 533 transitions. [2023-08-29 19:43:48,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 287 flow [2023-08-29 19:43:48,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:48,590 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 142 flow [2023-08-29 19:43:48,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-29 19:43:48,591 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-29 19:43:48,591 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 142 flow [2023-08-29 19:43:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:48,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:43:48,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:48,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash 83045174, now seen corresponding path program 1 times [2023-08-29 19:43:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:48,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96487036] [2023-08-29 19:43:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:48,611 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 19:43:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:48,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96487036] [2023-08-29 19:43:48,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96487036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:48,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:48,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154747901] [2023-08-29 19:43:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:48,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:48,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-29 19:43:48,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:48,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-29 19:43:48,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:48,715 INFO L130 PetriNetUnfolder]: 697/1174 cut-off events. [2023-08-29 19:43:48,716 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2023-08-29 19:43:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 1174 events. 697/1174 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5189 event pairs, 240 based on Foata normal form. 10/1012 useless extension candidates. Maximal degree in co-relation 2808. Up to 934 conditions per place. [2023-08-29 19:43:48,720 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-29 19:43:48,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 308 flow [2023-08-29 19:43:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-29 19:43:48,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222868217054264 [2023-08-29 19:43:48,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-29 19:43:48,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-29 19:43:48,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:48,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-29 19:43:48,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:48,725 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-08-29 19:43:48,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 308 flow [2023-08-29 19:43:48,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:48,727 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 147 flow [2023-08-29 19:43:48,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-29 19:43:48,728 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-29 19:43:48,728 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 147 flow [2023-08-29 19:43:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:48,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:48,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:43:48,729 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:48,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1095982589, now seen corresponding path program 1 times [2023-08-29 19:43:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:48,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-29 19:43:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:48,935 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 19:43:48,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-29 19:43:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748321640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909972452] [2023-08-29 19:43:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:48,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:48,938 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 19:43:48,961 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 19:43:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 19:43:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:49,133 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:43:49,133 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 19:43:49,152 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:43:49,152 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 19:43:49,330 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 19:43:49,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:49,452 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 19:43:49,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909972452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:49,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:43:49,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-29 19:43:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255027711] [2023-08-29 19:43:49,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:49,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:43:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:43:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:43:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 344 [2023-08-29 19:43:50,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 147 flow. Second operand has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states 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 19:43:50,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:50,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 344 [2023-08-29 19:43:50,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:51,454 INFO L130 PetriNetUnfolder]: 1736/2855 cut-off events. [2023-08-29 19:43:51,454 INFO L131 PetriNetUnfolder]: For 621/621 co-relation queries the response was YES. [2023-08-29 19:43:51,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6945 conditions, 2855 events. 1736/2855 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13494 event pairs, 183 based on Foata normal form. 44/2493 useless extension candidates. Maximal degree in co-relation 6936. Up to 1105 conditions per place. [2023-08-29 19:43:51,469 INFO L137 encePairwiseOnDemand]: 335/344 looper letters, 199 selfloop transitions, 22 changer transitions 0/222 dead transitions. [2023-08-29 19:43:51,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 222 transitions, 1031 flow [2023-08-29 19:43:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:43:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:43:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2311 transitions. [2023-08-29 19:43:51,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479858803986711 [2023-08-29 19:43:51,474 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2311 transitions. [2023-08-29 19:43:51,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2311 transitions. [2023-08-29 19:43:51,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:51,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2311 transitions. [2023-08-29 19:43:51,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.07142857142858) internal successors, (2311), 14 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states 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 19:43:51,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 344.0) internal successors, (5160), 15 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 19:43:51,485 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 344.0) internal successors, (5160), 15 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 19:43:51,485 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 147 flow. Second operand 14 states and 2311 transitions. [2023-08-29 19:43:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 222 transitions, 1031 flow [2023-08-29 19:43:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 222 transitions, 1028 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:51,492 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 306 flow [2023-08-29 19:43:51,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=306, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-08-29 19:43:51,492 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2023-08-29 19:43:51,492 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 306 flow [2023-08-29 19:43:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states 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 19:43:51,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:51,494 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 19:43:51,499 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 19:43:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-29 19:43:51,701 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:51,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -804475748, now seen corresponding path program 1 times [2023-08-29 19:43:51,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:51,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437759723] [2023-08-29 19:43:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:51,757 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 19:43:51,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437759723] [2023-08-29 19:43:51,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437759723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:51,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:51,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429512605] [2023-08-29 19:43:51,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:51,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:51,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:51,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 344 [2023-08-29 19:43:51,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:51,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 344 [2023-08-29 19:43:51,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:51,861 INFO L130 PetriNetUnfolder]: 520/1003 cut-off events. [2023-08-29 19:43:51,861 INFO L131 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2023-08-29 19:43:51,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1003 events. 520/1003 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4209 event pairs, 73 based on Foata normal form. 42/991 useless extension candidates. Maximal degree in co-relation 2721. Up to 749 conditions per place. [2023-08-29 19:43:51,864 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 51 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-08-29 19:43:51,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 408 flow [2023-08-29 19:43:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-29 19:43:51,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501937984496124 [2023-08-29 19:43:51,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-29 19:43:51,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-29 19:43:51,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:51,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-29 19:43:51,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:51,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:51,869 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 306 flow. Second operand 3 states and 518 transitions. [2023-08-29 19:43:51,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 408 flow [2023-08-29 19:43:51,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 384 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:51,873 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 258 flow [2023-08-29 19:43:51,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-29 19:43:51,873 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-29 19:43:51,873 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 258 flow [2023-08-29 19:43:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:51,874 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 19:43:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:43:51,874 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 19:43:51,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 341417615, now seen corresponding path program 1 times [2023-08-29 19:43:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:51,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078776806] [2023-08-29 19:43:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:51,929 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 19:43:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:51,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078776806] [2023-08-29 19:43:51,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078776806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:51,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:51,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:43:51,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59930927] [2023-08-29 19:43:51,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:43:51,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:43:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:43:52,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 344 [2023-08-29 19:43:52,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 155.16666666666666) internal successors, (931), 6 states have internal predecessors, (931), 0 states have call successors, (0), 0 states 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 19:43:52,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:52,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 344 [2023-08-29 19:43:52,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:52,184 INFO L130 PetriNetUnfolder]: 644/1237 cut-off events. [2023-08-29 19:43:52,185 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2023-08-29 19:43:52,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1237 events. 644/1237 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5344 event pairs, 55 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 3404. Up to 604 conditions per place. [2023-08-29 19:43:52,189 INFO L137 encePairwiseOnDemand]: 337/344 looper letters, 69 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2023-08-29 19:43:52,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 594 flow [2023-08-29 19:43:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:43:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:43:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2023-08-29 19:43:52,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46765988372093026 [2023-08-29 19:43:52,192 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2023-08-29 19:43:52,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2023-08-29 19:43:52,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:52,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2023-08-29 19:43:52,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:52,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 344.0) internal successors, (3096), 9 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states 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 19:43:52,197 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 344.0) internal successors, (3096), 9 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states 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 19:43:52,197 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 258 flow. Second operand 8 states and 1287 transitions. [2023-08-29 19:43:52,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 594 flow [2023-08-29 19:43:52,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:52,201 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 351 flow [2023-08-29 19:43:52,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=351, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-29 19:43:52,202 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2023-08-29 19:43:52,202 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 351 flow [2023-08-29 19:43:52,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.16666666666666) internal successors, (931), 6 states have internal predecessors, (931), 0 states have call successors, (0), 0 states 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 19:43:52,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:52,202 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 19:43:52,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:43:52,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:52,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:52,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1422636690, now seen corresponding path program 1 times [2023-08-29 19:43:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:52,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097648235] [2023-08-29 19:43:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:52,446 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 19:43:52,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:52,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097648235] [2023-08-29 19:43:52,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097648235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:52,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:52,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:43:52,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974559876] [2023-08-29 19:43:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:43:52,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:52,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:43:52,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:43:53,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 344 [2023-08-29 19:43:53,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 351 flow. Second operand has 12 states, 12 states have (on average 144.66666666666666) internal successors, (1736), 12 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 19:43:53,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:53,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 344 [2023-08-29 19:43:53,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:53,467 INFO L130 PetriNetUnfolder]: 780/1459 cut-off events. [2023-08-29 19:43:53,467 INFO L131 PetriNetUnfolder]: For 738/738 co-relation queries the response was YES. [2023-08-29 19:43:53,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 1459 events. 780/1459 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6566 event pairs, 123 based on Foata normal form. 0/1423 useless extension candidates. Maximal degree in co-relation 4132. Up to 914 conditions per place. [2023-08-29 19:43:53,473 INFO L137 encePairwiseOnDemand]: 334/344 looper letters, 128 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2023-08-29 19:43:53,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 141 transitions, 879 flow [2023-08-29 19:43:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:43:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:43:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1700 transitions. [2023-08-29 19:43:53,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492600422832981 [2023-08-29 19:43:53,476 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1700 transitions. [2023-08-29 19:43:53,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1700 transitions. [2023-08-29 19:43:53,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:53,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1700 transitions. [2023-08-29 19:43:53,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 154.54545454545453) internal successors, (1700), 11 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 19:43:53,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 19:43:53,483 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 19:43:53,483 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 351 flow. Second operand 11 states and 1700 transitions. [2023-08-29 19:43:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 141 transitions, 879 flow [2023-08-29 19:43:53,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 141 transitions, 823 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:53,487 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 380 flow [2023-08-29 19:43:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=380, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2023-08-29 19:43:53,488 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-08-29 19:43:53,488 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 380 flow [2023-08-29 19:43:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.66666666666666) internal successors, (1736), 12 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 19:43:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:53,489 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 19:43:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:43:53,490 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:53,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1606247161, now seen corresponding path program 1 times [2023-08-29 19:43:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:53,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035011499] [2023-08-29 19:43:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:53,524 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 19:43:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035011499] [2023-08-29 19:43:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035011499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:53,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075175926] [2023-08-29 19:43:53,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:53,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-29 19:43:53,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:53,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:53,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-29 19:43:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:53,683 INFO L130 PetriNetUnfolder]: 965/1868 cut-off events. [2023-08-29 19:43:53,683 INFO L131 PetriNetUnfolder]: For 1509/1509 co-relation queries the response was YES. [2023-08-29 19:43:53,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5370 conditions, 1868 events. 965/1868 cut-off events. For 1509/1509 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9466 event pairs, 558 based on Foata normal form. 76/1894 useless extension candidates. Maximal degree in co-relation 5348. Up to 1298 conditions per place. [2023-08-29 19:43:53,694 INFO L137 encePairwiseOnDemand]: 340/344 looper letters, 105 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2023-08-29 19:43:53,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 858 flow [2023-08-29 19:43:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-29 19:43:53,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2023-08-29 19:43:53,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-29 19:43:53,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-29 19:43:53,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:53,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-29 19:43:53,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 19:43:53,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:53,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 19:43:53,699 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 380 flow. Second operand 3 states and 540 transitions. [2023-08-29 19:43:53,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 858 flow [2023-08-29 19:43:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 838 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-29 19:43:53,703 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 387 flow [2023-08-29 19:43:53,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-08-29 19:43:53,704 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 30 predicate places. [2023-08-29 19:43:53,704 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 387 flow [2023-08-29 19:43:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:53,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:53,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:43:53,705 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 19:43:53,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1684784237, now seen corresponding path program 1 times [2023-08-29 19:43:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:53,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928769859] [2023-08-29 19:43:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:54,174 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 19:43:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928769859] [2023-08-29 19:43:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928769859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:54,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:43:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405734184] [2023-08-29 19:43:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:54,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:43:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:43:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:43:54,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 344 [2023-08-29 19:43:54,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 387 flow. Second operand has 14 states, 14 states have (on average 135.57142857142858) internal successors, (1898), 14 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states 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 19:43:54,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:54,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 344 [2023-08-29 19:43:54,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:55,580 INFO L130 PetriNetUnfolder]: 1254/2396 cut-off events. [2023-08-29 19:43:55,581 INFO L131 PetriNetUnfolder]: For 1849/1849 co-relation queries the response was YES. [2023-08-29 19:43:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7276 conditions, 2396 events. 1254/2396 cut-off events. For 1849/1849 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12498 event pairs, 280 based on Foata normal form. 12/2394 useless extension candidates. Maximal degree in co-relation 7253. Up to 1725 conditions per place. [2023-08-29 19:43:55,590 INFO L137 encePairwiseOnDemand]: 329/344 looper letters, 143 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2023-08-29 19:43:55,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 171 transitions, 1126 flow [2023-08-29 19:43:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:43:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:43:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2419 transitions. [2023-08-29 19:43:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41364569083447333 [2023-08-29 19:43:55,595 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2419 transitions. [2023-08-29 19:43:55,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2419 transitions. [2023-08-29 19:43:55,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:55,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2419 transitions. [2023-08-29 19:43:55,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.2941176470588) internal successors, (2419), 17 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states 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 19:43:55,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 344.0) internal successors, (6192), 18 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states 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 19:43:55,606 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 344.0) internal successors, (6192), 18 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states 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 19:43:55,606 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 387 flow. Second operand 17 states and 2419 transitions. [2023-08-29 19:43:55,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 171 transitions, 1126 flow [2023-08-29 19:43:55,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 171 transitions, 1113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:55,612 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 587 flow [2023-08-29 19:43:55,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=587, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2023-08-29 19:43:55,614 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-08-29 19:43:55,614 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 587 flow [2023-08-29 19:43:55,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 135.57142857142858) internal successors, (1898), 14 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states 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 19:43:55,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:55,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:55,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:43:55,615 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 19:43:55,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 627876135, now seen corresponding path program 2 times [2023-08-29 19:43:55,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:55,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910702108] [2023-08-29 19:43:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:55,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:56,108 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 19:43:56,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910702108] [2023-08-29 19:43:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910702108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:56,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:43:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973580924] [2023-08-29 19:43:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:43:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:56,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:43:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:43:57,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 344 [2023-08-29 19:43:57,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 587 flow. Second operand has 15 states, 15 states have (on average 132.46666666666667) internal successors, (1987), 15 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states 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 19:43:57,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:57,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 344 [2023-08-29 19:43:57,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:57,954 INFO L130 PetriNetUnfolder]: 1481/2834 cut-off events. [2023-08-29 19:43:57,954 INFO L131 PetriNetUnfolder]: For 2622/2622 co-relation queries the response was YES. [2023-08-29 19:43:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9132 conditions, 2834 events. 1481/2834 cut-off events. For 2622/2622 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15582 event pairs, 353 based on Foata normal form. 12/2832 useless extension candidates. Maximal degree in co-relation 9102. Up to 1739 conditions per place. [2023-08-29 19:43:57,966 INFO L137 encePairwiseOnDemand]: 329/344 looper letters, 143 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2023-08-29 19:43:57,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 176 transitions, 1277 flow [2023-08-29 19:43:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:43:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:43:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1833 transitions. [2023-08-29 19:43:57,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2023-08-29 19:43:57,970 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1833 transitions. [2023-08-29 19:43:57,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1833 transitions. [2023-08-29 19:43:57,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:57,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1833 transitions. [2023-08-29 19:43:57,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states 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 19:43:57,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 344.0) internal successors, (4816), 14 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states 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 19:43:57,978 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 344.0) internal successors, (4816), 14 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states 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 19:43:57,978 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 587 flow. Second operand 13 states and 1833 transitions. [2023-08-29 19:43:57,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 176 transitions, 1277 flow [2023-08-29 19:43:57,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 176 transitions, 1266 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:43:57,987 INFO L231 Difference]: Finished difference. Result has 116 places, 102 transitions, 765 flow [2023-08-29 19:43:57,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=765, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2023-08-29 19:43:57,987 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2023-08-29 19:43:57,987 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 765 flow [2023-08-29 19:43:57,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 132.46666666666667) internal successors, (1987), 15 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states 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 19:43:57,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:57,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:57,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:43:57,988 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:57,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1369315499, now seen corresponding path program 3 times [2023-08-29 19:43:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567523712] [2023-08-29 19:43:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:58,453 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 19:43:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567523712] [2023-08-29 19:43:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567523712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:58,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:58,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:43:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820756090] [2023-08-29 19:43:58,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:43:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:43:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:43:59,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 344 [2023-08-29 19:43:59,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 765 flow. Second operand has 15 states, 15 states have (on average 132.46666666666667) internal successors, (1987), 15 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states 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 19:43:59,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:59,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 344 [2023-08-29 19:43:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:00,252 INFO L130 PetriNetUnfolder]: 1469/2810 cut-off events. [2023-08-29 19:44:00,252 INFO L131 PetriNetUnfolder]: For 3687/3687 co-relation queries the response was YES. [2023-08-29 19:44:00,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9686 conditions, 2810 events. 1469/2810 cut-off events. For 3687/3687 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15347 event pairs, 309 based on Foata normal form. 12/2808 useless extension candidates. Maximal degree in co-relation 9649. Up to 1303 conditions per place. [2023-08-29 19:44:00,264 INFO L137 encePairwiseOnDemand]: 329/344 looper letters, 135 selfloop transitions, 42 changer transitions 0/178 dead transitions. [2023-08-29 19:44:00,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 178 transitions, 1405 flow [2023-08-29 19:44:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:44:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:44:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1964 transitions. [2023-08-29 19:44:00,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40780730897009965 [2023-08-29 19:44:00,268 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1964 transitions. [2023-08-29 19:44:00,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1964 transitions. [2023-08-29 19:44:00,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:00,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1964 transitions. [2023-08-29 19:44:00,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 140.28571428571428) internal successors, (1964), 14 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 19:44:00,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 344.0) internal successors, (5160), 15 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 19:44:00,274 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 344.0) internal successors, (5160), 15 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 19:44:00,275 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 765 flow. Second operand 14 states and 1964 transitions. [2023-08-29 19:44:00,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 178 transitions, 1405 flow [2023-08-29 19:44:00,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 178 transitions, 1360 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-29 19:44:00,288 INFO L231 Difference]: Finished difference. Result has 128 places, 109 transitions, 907 flow [2023-08-29 19:44:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=907, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2023-08-29 19:44:00,288 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2023-08-29 19:44:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 907 flow [2023-08-29 19:44:00,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 132.46666666666667) internal successors, (1987), 15 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states 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 19:44:00,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:00,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 19:44:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:44:00,289 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:00,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1033663149, now seen corresponding path program 1 times [2023-08-29 19:44:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143510252] [2023-08-29 19:44:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143510252] [2023-08-29 19:44:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143510252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71113941] [2023-08-29 19:44:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:00,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:00,344 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 19:44:00,346 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 19:44:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:44:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:00,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71113941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:00,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-29 19:44:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478199834] [2023-08-29 19:44:00,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:44:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:44:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:44:00,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 344 [2023-08-29 19:44:00,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 907 flow. Second operand has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:00,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:00,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 344 [2023-08-29 19:44:00,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:01,053 INFO L130 PetriNetUnfolder]: 2212/4226 cut-off events. [2023-08-29 19:44:01,054 INFO L131 PetriNetUnfolder]: For 5890/5890 co-relation queries the response was YES. [2023-08-29 19:44:01,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14519 conditions, 4226 events. 2212/4226 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 22142 event pairs, 579 based on Foata normal form. 40/4266 useless extension candidates. Maximal degree in co-relation 14477. Up to 1303 conditions per place. [2023-08-29 19:44:01,106 INFO L137 encePairwiseOnDemand]: 338/344 looper letters, 239 selfloop transitions, 33 changer transitions 0/273 dead transitions. [2023-08-29 19:44:01,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 273 transitions, 2229 flow [2023-08-29 19:44:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:44:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:44:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1907 transitions. [2023-08-29 19:44:01,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039640591966174 [2023-08-29 19:44:01,109 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1907 transitions. [2023-08-29 19:44:01,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1907 transitions. [2023-08-29 19:44:01,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:01,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1907 transitions. [2023-08-29 19:44:01,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.36363636363637) internal successors, (1907), 11 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 19:44:01,115 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 19:44:01,116 INFO L175 Difference]: Start difference. First operand has 128 places, 109 transitions, 907 flow. Second operand 11 states and 1907 transitions. [2023-08-29 19:44:01,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 273 transitions, 2229 flow [2023-08-29 19:44:01,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 273 transitions, 2164 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-08-29 19:44:01,134 INFO L231 Difference]: Finished difference. Result has 135 places, 129 transitions, 1102 flow [2023-08-29 19:44:01,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=135, PETRI_TRANSITIONS=129} [2023-08-29 19:44:01,134 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-29 19:44:01,134 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 129 transitions, 1102 flow [2023-08-29 19:44:01,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:01,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:01,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:01,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 19:44:01,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:01,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:01,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1403221221, now seen corresponding path program 1 times [2023-08-29 19:44:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:01,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175768923] [2023-08-29 19:44:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175768923] [2023-08-29 19:44:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175768923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:01,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721862091] [2023-08-29 19:44:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:01,379 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 19:44:01,381 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 19:44:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:44:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:01,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:44:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721862091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:01,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:01,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:44:01,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717413830] [2023-08-29 19:44:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:01,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:44:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:44:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:44:01,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 344 [2023-08-29 19:44:01,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 129 transitions, 1102 flow. Second operand has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 19:44:01,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:01,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 344 [2023-08-29 19:44:01,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:02,449 INFO L130 PetriNetUnfolder]: 4035/8129 cut-off events. [2023-08-29 19:44:02,450 INFO L131 PetriNetUnfolder]: For 13889/13889 co-relation queries the response was YES. [2023-08-29 19:44:02,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28329 conditions, 8129 events. 4035/8129 cut-off events. For 13889/13889 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 53733 event pairs, 929 based on Foata normal form. 996/9124 useless extension candidates. Maximal degree in co-relation 28281. Up to 1944 conditions per place. [2023-08-29 19:44:02,491 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 397 selfloop transitions, 22 changer transitions 0/429 dead transitions. [2023-08-29 19:44:02,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 429 transitions, 4592 flow [2023-08-29 19:44:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:44:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:44:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1083 transitions. [2023-08-29 19:44:02,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247093023255814 [2023-08-29 19:44:02,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1083 transitions. [2023-08-29 19:44:02,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1083 transitions. [2023-08-29 19:44:02,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:02,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1083 transitions. [2023-08-29 19:44:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states 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 19:44:02,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 19:44:02,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 19:44:02,497 INFO L175 Difference]: Start difference. First operand has 135 places, 129 transitions, 1102 flow. Second operand 6 states and 1083 transitions. [2023-08-29 19:44:02,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 429 transitions, 4592 flow [2023-08-29 19:44:02,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 429 transitions, 4474 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:02,548 INFO L231 Difference]: Finished difference. Result has 144 places, 140 transitions, 1269 flow [2023-08-29 19:44:02,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1269, PETRI_PLACES=144, PETRI_TRANSITIONS=140} [2023-08-29 19:44:02,549 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2023-08-29 19:44:02,549 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 140 transitions, 1269 flow [2023-08-29 19:44:02,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 19:44:02,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:02,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:02,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 19:44:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:02,755 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:02,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash 393908137, now seen corresponding path program 1 times [2023-08-29 19:44:02,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:02,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015498658] [2023-08-29 19:44:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:02,858 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 19:44:02,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015498658] [2023-08-29 19:44:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015498658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86014363] [2023-08-29 19:44:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:02,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:02,860 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 19:44:02,862 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 19:44:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:02,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:44:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:02,983 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 19:44:02,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:02,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86014363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:44:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-29 19:44:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681103769] [2023-08-29 19:44:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:02,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:44:02,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:44:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:44:03,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 344 [2023-08-29 19:44:03,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 140 transitions, 1269 flow. Second operand has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:03,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:03,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 344 [2023-08-29 19:44:03,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:04,127 INFO L130 PetriNetUnfolder]: 4538/8965 cut-off events. [2023-08-29 19:44:04,128 INFO L131 PetriNetUnfolder]: For 19426/19426 co-relation queries the response was YES. [2023-08-29 19:44:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33549 conditions, 8965 events. 4538/8965 cut-off events. For 19426/19426 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 58999 event pairs, 1470 based on Foata normal form. 48/9013 useless extension candidates. Maximal degree in co-relation 33497. Up to 3746 conditions per place. [2023-08-29 19:44:04,182 INFO L137 encePairwiseOnDemand]: 337/344 looper letters, 183 selfloop transitions, 33 changer transitions 0/217 dead transitions. [2023-08-29 19:44:04,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 217 transitions, 2133 flow [2023-08-29 19:44:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:44:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:44:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1177 transitions. [2023-08-29 19:44:04,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887873754152824 [2023-08-29 19:44:04,185 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1177 transitions. [2023-08-29 19:44:04,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1177 transitions. [2023-08-29 19:44:04,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:04,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1177 transitions. [2023-08-29 19:44:04,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states 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 19:44:04,188 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states 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 19:44:04,188 INFO L175 Difference]: Start difference. First operand has 144 places, 140 transitions, 1269 flow. Second operand 7 states and 1177 transitions. [2023-08-29 19:44:04,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 217 transitions, 2133 flow [2023-08-29 19:44:04,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 217 transitions, 2067 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:04,253 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1402 flow [2023-08-29 19:44:04,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1402, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2023-08-29 19:44:04,253 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 102 predicate places. [2023-08-29 19:44:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1402 flow [2023-08-29 19:44:04,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:04,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:04,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:04,263 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 19:44:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:04,459 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 19:44:04,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1575140926, now seen corresponding path program 1 times [2023-08-29 19:44:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742442636] [2023-08-29 19:44:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:04,728 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 19:44:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:44:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742442636] [2023-08-29 19:44:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742442636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:44:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499450854] [2023-08-29 19:44:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:04,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:44:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:04,730 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 19:44:04,732 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 19:44:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:04,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 19:44:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:05,125 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 19:44:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:05,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:44:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-29 19:44:05,405 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 19:44:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499450854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:05,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:44:05,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-29 19:44:05,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19867842] [2023-08-29 19:44:05,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:05,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-29 19:44:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:44:05,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-29 19:44:05,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-08-29 19:44:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 344 [2023-08-29 19:44:07,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1402 flow. Second operand has 32 states, 32 states have (on average 142.34375) internal successors, (4555), 32 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states 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 19:44:07,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:07,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 344 [2023-08-29 19:44:07,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:11,682 INFO L130 PetriNetUnfolder]: 5676/11331 cut-off events. [2023-08-29 19:44:11,683 INFO L131 PetriNetUnfolder]: For 24511/24511 co-relation queries the response was YES. [2023-08-29 19:44:11,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42048 conditions, 11331 events. 5676/11331 cut-off events. For 24511/24511 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 78138 event pairs, 672 based on Foata normal form. 282/11613 useless extension candidates. Maximal degree in co-relation 41993. Up to 2291 conditions per place. [2023-08-29 19:44:11,763 INFO L137 encePairwiseOnDemand]: 328/344 looper letters, 318 selfloop transitions, 112 changer transitions 0/431 dead transitions. [2023-08-29 19:44:11,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 431 transitions, 3944 flow [2023-08-29 19:44:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 19:44:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 19:44:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5189 transitions. [2023-08-29 19:44:11,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309800664451827 [2023-08-29 19:44:11,767 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5189 transitions. [2023-08-29 19:44:11,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5189 transitions. [2023-08-29 19:44:11,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:11,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5189 transitions. [2023-08-29 19:44:11,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 148.25714285714287) internal successors, (5189), 35 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states 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 19:44:11,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 344.0) internal successors, (12384), 36 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states 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 19:44:11,784 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 344.0) internal successors, (12384), 36 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states 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 19:44:11,784 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1402 flow. Second operand 35 states and 5189 transitions. [2023-08-29 19:44:11,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 431 transitions, 3944 flow [2023-08-29 19:44:11,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 431 transitions, 3896 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:11,862 INFO L231 Difference]: Finished difference. Result has 198 places, 215 transitions, 2333 flow [2023-08-29 19:44:11,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2333, PETRI_PLACES=198, PETRI_TRANSITIONS=215} [2023-08-29 19:44:11,863 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 149 predicate places. [2023-08-29 19:44:11,863 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 215 transitions, 2333 flow [2023-08-29 19:44:11,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 142.34375) internal successors, (4555), 32 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states 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 19:44:11,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:11,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:11,871 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 19:44:12,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 19:44:12,073 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 19:44:12,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash 638794037, now seen corresponding path program 1 times [2023-08-29 19:44:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:44:12,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897093381] [2023-08-29 19:44:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:12,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:44:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:44:12,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:44:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:44:12,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:44:12,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:44:12,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:44:12,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:44:12,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:44:12,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:44:12,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:44:12,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:44:12,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:44:12,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:44:12,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:44:12,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:44:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:44:12,159 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:12,162 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:44:12,162 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:44:12,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:44:12 BasicIcfg [2023-08-29 19:44:12,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:44:12,217 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:44:12,217 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:44:12,217 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:44:12,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:42" (3/4) ... [2023-08-29 19:44:12,219 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:44:12,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:44:12,219 INFO L158 Benchmark]: Toolchain (without parser) took 30845.31ms. Allocated memory was 75.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 50.3MB in the beginning and 506.8MB in the end (delta: -456.5MB). Peak memory consumption was 752.3MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,219 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory is still 52.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:44:12,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 494.32ms. Allocated memory was 75.5MB in the beginning and 100.7MB in the end (delta: 25.2MB). Free memory was 50.1MB in the beginning and 64.7MB in the end (delta: -14.6MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.17ms. Allocated memory is still 100.7MB. Free memory was 64.7MB in the beginning and 61.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,221 INFO L158 Benchmark]: Boogie Preprocessor took 45.30ms. Allocated memory is still 100.7MB. Free memory was 61.9MB in the beginning and 60.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,221 INFO L158 Benchmark]: RCFGBuilder took 389.11ms. Allocated memory is still 100.7MB. Free memory was 60.2MB in the beginning and 67.1MB in the end (delta: -7.0MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,221 INFO L158 Benchmark]: TraceAbstraction took 29854.85ms. Allocated memory was 100.7MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 66.7MB in the beginning and 506.8MB in the end (delta: -440.1MB). Peak memory consumption was 744.6MB. Max. memory is 16.1GB. [2023-08-29 19:44:12,222 INFO L158 Benchmark]: Witness Printer took 2.28ms. Allocated memory is still 1.3GB. Free memory is still 506.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:44:12,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory is still 52.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 494.32ms. Allocated memory was 75.5MB in the beginning and 100.7MB in the end (delta: 25.2MB). Free memory was 50.1MB in the beginning and 64.7MB in the end (delta: -14.6MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.17ms. Allocated memory is still 100.7MB. Free memory was 64.7MB in the beginning and 61.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.30ms. Allocated memory is still 100.7MB. Free memory was 61.9MB in the beginning and 60.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 389.11ms. Allocated memory is still 100.7MB. Free memory was 60.2MB in the beginning and 67.1MB in the end (delta: -7.0MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * TraceAbstraction took 29854.85ms. Allocated memory was 100.7MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 66.7MB in the beginning and 506.8MB in the end (delta: -440.1MB). Peak memory consumption was 744.6MB. Max. memory is 16.1GB. * Witness Printer took 2.28ms. Allocated memory is still 1.3GB. Free memory is still 506.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 43 TrivialSequentialCompositions, 101 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 170 TotalNumberOfCompositions, 13285 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9683, independent: 9467, independent conditional: 0, independent unconditional: 9467, dependent: 216, dependent conditional: 0, dependent unconditional: 216, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4966, independent: 4906, independent conditional: 0, independent unconditional: 4906, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9683, independent: 4561, independent conditional: 0, independent unconditional: 4561, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 4966, unknown conditional: 0, unknown unconditional: 4966] , Statistics on independence cache: Total cache size (in pairs): 300, Positive cache size: 279, Positive conditional cache size: 0, Positive unconditional cache size: 279, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=799, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 29.7s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6705 SdHoareTripleChecker+Valid, 11.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5863 mSDsluCounter, 9947 SdHoareTripleChecker+Invalid, 9.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9893 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29808 IncrementalHoareTripleChecker+Invalid, 30015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 54 mSDtfsCounter, 29808 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2333occurred in iteration=22, InterpolantAutomatonStates: 175, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 453 NumberOfCodeBlocks, 453 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 4083 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1218 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 31 InterpolantComputations, 18 PerfectInterpolantSequences, 16/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:44:12,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --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 19:44:13,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:44:13,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:44:13,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:44:13,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:44:13,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:44:13,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:44:13,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:44:13,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:44:13,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:44:13,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:44:13,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:44:13,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:44:13,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:44:13,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:44:13,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:44:13,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:44:13,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:44:13,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:44:13,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:44:13,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:44:13,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:44:13,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:44:13,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:44:13,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:44:13,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:44:13,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:44:13,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:44:13,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:44:13,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:44:13,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:44:13,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:44:13,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:44:13,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:44:13,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:44:13,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:44:13,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:44:13,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:44:13,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:44:13,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:44:13,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:44:13,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 19:44:13,838 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:44:13,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:44:13,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:44:13,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:44:13,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:44:13,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:44:13,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:44:13,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:44:13,841 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:44:13,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:44:13,841 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:44:13,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:44:13,842 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:44:13,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:44:13,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:44:13,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:44:13,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:44:13,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:44:13,844 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 19:44:13,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 19:44:13,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:44:13,845 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:44:13,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:44:13,845 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 19:44:13,845 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:44:13,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:44:14,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:44:14,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:44:14,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:44:14,093 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:44:14,093 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:44:14,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-29 19:44:14,979 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:44:15,153 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:44:15,153 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-29 19:44:15,165 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb721c468/3ee3058873d8456786eec386b19a198e/FLAGd652dedc5 [2023-08-29 19:44:15,181 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb721c468/3ee3058873d8456786eec386b19a198e [2023-08-29 19:44:15,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:44:15,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:44:15,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:44:15,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:44:15,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:44:15,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4f4ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15, skipping insertion in model container [2023-08-29 19:44:15,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:44:15,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:44:15,461 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-1.i[41530,41543] [2023-08-29 19:44:15,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:44:15,486 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:44:15,508 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-1.i[41530,41543] [2023-08-29 19:44:15,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:44:15,554 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:44:15,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15 WrapperNode [2023-08-29 19:44:15,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:44:15,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:44:15,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:44:15,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:44:15,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,586 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 152 [2023-08-29 19:44:15,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:44:15,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:44:15,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:44:15,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:44:15,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:44:15,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:44:15,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:44:15,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:44:15,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (1/1) ... [2023-08-29 19:44:15,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:44:15,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:44:15,645 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 19:44:15,647 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 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:44:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:44:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:44:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 19:44:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 19:44:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-29 19:44:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:44:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:44:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:44:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:44:15,671 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 19:44:15,804 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:44:15,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:44:16,122 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:44:16,128 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:44:16,130 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:44:16,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:44:16 BoogieIcfgContainer [2023-08-29 19:44:16,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:44:16,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:44:16,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:44:16,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:44:16,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:44:15" (1/3) ... [2023-08-29 19:44:16,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d31938e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:44:16, skipping insertion in model container [2023-08-29 19:44:16,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:44:15" (2/3) ... [2023-08-29 19:44:16,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d31938e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:44:16, skipping insertion in model container [2023-08-29 19:44:16,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:44:16" (3/3) ... [2023-08-29 19:44:16,139 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-08-29 19:44:16,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:44:16,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:44:16,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:44:16,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:44:16,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2023-08-29 19:44:16,335 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-29 19:44:16,338 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:44:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 427 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:44:16,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2023-08-29 19:44:16,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 340 flow [2023-08-29 19:44:16,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:44:16,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-29 19:44:16,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-29 19:44:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 164 transitions, 340 flow [2023-08-29 19:44:16,393 INFO L130 PetriNetUnfolder]: 10/164 cut-off events. [2023-08-29 19:44:16,393 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:44:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 427 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:44:16,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-29 19:44:22,383 INFO L134 LiptonReduction]: Checked pairs total: 13555 [2023-08-29 19:44:22,384 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-29 19:44:22,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:44:22,397 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;@936573e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:44:22,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:44:22,398 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:44:22,398 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:44:22,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:22,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:44:22,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:22,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 691, now seen corresponding path program 1 times [2023-08-29 19:44:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807389490] [2023-08-29 19:44:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:22,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:22,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 19:44:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 19:44:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:22,472 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 19:44:22,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:22,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807389490] [2023-08-29 19:44:22,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807389490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:22,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:22,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:44:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49972291] [2023-08-29 19:44:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:22,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:44:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:44:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:44:22,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 334 [2023-08-29 19:44:22,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:22,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 334 [2023-08-29 19:44:22,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:22,814 INFO L130 PetriNetUnfolder]: 1555/2394 cut-off events. [2023-08-29 19:44:22,814 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-29 19:44:22,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4835 conditions, 2394 events. 1555/2394 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11057 event pairs, 1267 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 4566. Up to 2395 conditions per place. [2023-08-29 19:44:22,823 INFO L137 encePairwiseOnDemand]: 332/334 looper letters, 45 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:44:22,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 192 flow [2023-08-29 19:44:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:44:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:44:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 365 transitions. [2023-08-29 19:44:22,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464071856287425 [2023-08-29 19:44:22,833 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 365 transitions. [2023-08-29 19:44:22,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 365 transitions. [2023-08-29 19:44:22,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:22,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 365 transitions. [2023-08-29 19:44:22,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 19:44:22,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states 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 19:44:22,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states 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 19:44:22,842 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 365 transitions. [2023-08-29 19:44:22,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 192 flow [2023-08-29 19:44:22,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:22,846 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:44:22,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:44:22,849 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:44:22,849 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:44:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:22,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:22,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:44:22,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 19:44:23,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:23,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:23,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash 681011, now seen corresponding path program 1 times [2023-08-29 19:44:23,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:23,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101443994] [2023-08-29 19:44:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:23,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:23,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:23,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:23,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 19:44:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:44:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:23,162 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:44:23,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-29 19:44:23,171 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 19:44:23,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:23,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101443994] [2023-08-29 19:44:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101443994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:23,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:23,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:44:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451626848] [2023-08-29 19:44:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:23,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:23,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 334 [2023-08-29 19:44:23,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:23,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:23,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 334 [2023-08-29 19:44:23,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:23,396 INFO L130 PetriNetUnfolder]: 1525/2337 cut-off events. [2023-08-29 19:44:23,396 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:44:23,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2337 events. 1525/2337 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10655 event pairs, 1242 based on Foata normal form. 0/1321 useless extension candidates. Maximal degree in co-relation 4688. Up to 2336 conditions per place. [2023-08-29 19:44:23,403 INFO L137 encePairwiseOnDemand]: 330/334 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:44:23,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 176 flow [2023-08-29 19:44:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-29 19:44:23,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940119760479042 [2023-08-29 19:44:23,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-29 19:44:23,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-29 19:44:23,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:23,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-29 19:44:23,408 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 19:44:23,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:23,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:23,410 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 495 transitions. [2023-08-29 19:44:23,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 176 flow [2023-08-29 19:44:23,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:23,411 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:44:23,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:44:23,412 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:44:23,412 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:44:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:23,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:23,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:44:23,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 19:44:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:23,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:23,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash 681012, now seen corresponding path program 1 times [2023-08-29 19:44:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:23,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524641983] [2023-08-29 19:44:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:23,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 19:44:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:23,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:44:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:23,689 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:44:23,689 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 19:44:23,705 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 19:44:23,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:23,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:23,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524641983] [2023-08-29 19:44:23,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524641983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:23,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:23,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:44:23,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675846840] [2023-08-29 19:44:23,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:23,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 334 [2023-08-29 19:44:23,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:23,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:23,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 334 [2023-08-29 19:44:23,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:23,895 INFO L130 PetriNetUnfolder]: 1495/2280 cut-off events. [2023-08-29 19:44:23,895 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:44:23,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 2280 events. 1495/2280 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10282 event pairs, 1217 based on Foata normal form. 0/1302 useless extension candidates. Maximal degree in co-relation 4576. Up to 2279 conditions per place. [2023-08-29 19:44:23,902 INFO L137 encePairwiseOnDemand]: 330/334 looper letters, 39 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:44:23,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 172 flow [2023-08-29 19:44:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-29 19:44:23,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039920159680639 [2023-08-29 19:44:23,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-29 19:44:23,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-29 19:44:23,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:23,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-29 19:44:23,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 19:44:23,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:23,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:23,907 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 505 transitions. [2023-08-29 19:44:23,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 172 flow [2023-08-29 19:44:23,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:23,909 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:44:23,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:44:23,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:44:23,909 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:44:23,910 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 19:44:23,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:23,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:44:23,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:24,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:24,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:24,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 654469537, now seen corresponding path program 1 times [2023-08-29 19:44:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:24,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426842758] [2023-08-29 19:44:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:24,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:24,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 19:44:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 19:44:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:24,187 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:44:24,187 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 19:44:24,202 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 19:44:24,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:24,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426842758] [2023-08-29 19:44:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426842758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:24,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:44:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796641356] [2023-08-29 19:44:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:24,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:24,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 334 [2023-08-29 19:44:24,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:24,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:24,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 334 [2023-08-29 19:44:24,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:24,371 INFO L130 PetriNetUnfolder]: 1091/1694 cut-off events. [2023-08-29 19:44:24,372 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:44:24,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 1694 events. 1091/1694 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7358 event pairs, 880 based on Foata normal form. 0/1046 useless extension candidates. Maximal degree in co-relation 3404. Up to 1693 conditions per place. [2023-08-29 19:44:24,384 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:44:24,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2023-08-29 19:44:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-29 19:44:24,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49001996007984033 [2023-08-29 19:44:24,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-29 19:44:24,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-29 19:44:24,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:24,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-29 19:44:24,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:24,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:24,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:24,389 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 491 transitions. [2023-08-29 19:44:24,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2023-08-29 19:44:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:24,390 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:44:24,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, 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 19:44:24,391 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:44:24,391 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:44:24,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:24,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:24,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:44:24,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:24,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:24,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 654469538, now seen corresponding path program 1 times [2023-08-29 19:44:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581137584] [2023-08-29 19:44:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:24,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:24,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 19:44:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 19:44:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:24,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-08-29 19:44:24,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 19:44:24,697 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 19:44:24,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:24,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581137584] [2023-08-29 19:44:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581137584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:24,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:24,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:44:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734407585] [2023-08-29 19:44:24,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:24,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 334 [2023-08-29 19:44:24,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 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 19:44:24,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:24,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 334 [2023-08-29 19:44:24,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:24,852 INFO L130 PetriNetUnfolder]: 687/1108 cut-off events. [2023-08-29 19:44:24,852 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:44:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 1108 events. 687/1108 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4625 event pairs, 543 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 2232. Up to 1107 conditions per place. [2023-08-29 19:44:24,855 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:44:24,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2023-08-29 19:44:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-29 19:44:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500998003992016 [2023-08-29 19:44:24,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-29 19:44:24,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-29 19:44:24,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:24,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-29 19:44:24,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:24,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:24,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:24,860 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 502 transitions. [2023-08-29 19:44:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2023-08-29 19:44:24,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:24,861 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:44:24,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, 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 19:44:24,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:44:24,862 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:44:24,862 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 19:44:24,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:24,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:44:24,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:25,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:25,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1186894238, now seen corresponding path program 1 times [2023-08-29 19:44:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473512571] [2023-08-29 19:44:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:25,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:25,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 19:44:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:25,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:44:25,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:25,133 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 19:44:25,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:25,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473512571] [2023-08-29 19:44:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473512571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:25,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:44:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34103322] [2023-08-29 19:44:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:25,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 334 [2023-08-29 19:44:25,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:25,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:25,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 334 [2023-08-29 19:44:25,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:25,310 INFO L130 PetriNetUnfolder]: 1159/1872 cut-off events. [2023-08-29 19:44:25,311 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 19:44:25,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1872 events. 1159/1872 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8378 event pairs, 342 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 3770. Up to 1120 conditions per place. [2023-08-29 19:44:25,316 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 67 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-29 19:44:25,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 297 flow [2023-08-29 19:44:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-29 19:44:25,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359281437125748 [2023-08-29 19:44:25,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-29 19:44:25,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-29 19:44:25,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:25,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-29 19:44:25,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 19:44:25,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:25,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:25,322 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 537 transitions. [2023-08-29 19:44:25,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 297 flow [2023-08-29 19:44:25,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 71 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:25,323 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-29 19:44:25,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-29 19:44:25,324 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:44:25,324 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-29 19:44:25,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:25,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:25,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:44:25,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-29 19:44:25,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:25,531 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 19:44:25,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1186895599, now seen corresponding path program 1 times [2023-08-29 19:44:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031739692] [2023-08-29 19:44:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:25,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:25,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:25,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 19:44:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:44:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:25,666 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 19:44:25,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-29 19:44:25,695 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:44:25,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 19:44:25,851 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 19:44:25,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:25,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:25,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031739692] [2023-08-29 19:44:25,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031739692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:25,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:25,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:44:25,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177592219] [2023-08-29 19:44:25,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:25,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:44:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:44:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:44:26,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 334 [2023-08-29 19:44:26,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 19:44:26,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:26,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 334 [2023-08-29 19:44:26,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:26,442 INFO L130 PetriNetUnfolder]: 1455/2346 cut-off events. [2023-08-29 19:44:26,442 INFO L131 PetriNetUnfolder]: For 293/293 co-relation queries the response was YES. [2023-08-29 19:44:26,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 2346 events. 1455/2346 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10715 event pairs, 261 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 5084. Up to 1819 conditions per place. [2023-08-29 19:44:26,449 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 80 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2023-08-29 19:44:26,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 85 transitions, 388 flow [2023-08-29 19:44:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:44:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:44:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-08-29 19:44:26,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202095808383234 [2023-08-29 19:44:26,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-08-29 19:44:26,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-08-29 19:44:26,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:26,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-08-29 19:44:26,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 19:44:26,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 19:44:26,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 19:44:26,455 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 4 states and 695 transitions. [2023-08-29 19:44:26,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 85 transitions, 388 flow [2023-08-29 19:44:26,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 85 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:26,457 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 142 flow [2023-08-29 19:44:26,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-29 19:44:26,458 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-29 19:44:26,458 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 142 flow [2023-08-29 19:44:26,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 19:44:26,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:26,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:44:26,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:26,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:26,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1186895600, now seen corresponding path program 1 times [2023-08-29 19:44:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558178802] [2023-08-29 19:44:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:26,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:26,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:26,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 19:44:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:44:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:26,754 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2023-08-29 19:44:26,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2023-08-29 19:44:26,799 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 19:44:26,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:26,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:26,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558178802] [2023-08-29 19:44:26,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558178802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:26,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:44:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37680231] [2023-08-29 19:44:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:44:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:44:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:44:26,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 334 [2023-08-29 19:44:26,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 19:44:26,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:26,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 334 [2023-08-29 19:44:26,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:27,087 INFO L130 PetriNetUnfolder]: 1542/2497 cut-off events. [2023-08-29 19:44:27,087 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2023-08-29 19:44:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 2497 events. 1542/2497 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11919 event pairs, 577 based on Foata normal form. 0/2139 useless extension candidates. Maximal degree in co-relation 5594. Up to 1885 conditions per place. [2023-08-29 19:44:27,096 INFO L137 encePairwiseOnDemand]: 330/334 looper letters, 67 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-08-29 19:44:27,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 353 flow [2023-08-29 19:44:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:44:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:44:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-08-29 19:44:27,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059880239520959 [2023-08-29 19:44:27,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-08-29 19:44:27,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-08-29 19:44:27,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:27,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-08-29 19:44:27,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 19:44:27,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 19:44:27,101 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 19:44:27,101 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 142 flow. Second operand 4 states and 676 transitions. [2023-08-29 19:44:27,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 353 flow [2023-08-29 19:44:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:27,103 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 162 flow [2023-08-29 19:44:27,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-29 19:44:27,103 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-29 19:44:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 162 flow [2023-08-29 19:44:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 19:44:27,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:27,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:27,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:27,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:27,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:27,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1501153307, now seen corresponding path program 1 times [2023-08-29 19:44:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600308022] [2023-08-29 19:44:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:27,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:27,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 19:44:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:44:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:27,378 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 19:44:27,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:27,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600308022] [2023-08-29 19:44:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600308022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:27,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:44:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960867594] [2023-08-29 19:44:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:27,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 334 [2023-08-29 19:44:27,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:27,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:27,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 334 [2023-08-29 19:44:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:27,576 INFO L130 PetriNetUnfolder]: 1392/2279 cut-off events. [2023-08-29 19:44:27,577 INFO L131 PetriNetUnfolder]: For 435/435 co-relation queries the response was YES. [2023-08-29 19:44:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5122 conditions, 2279 events. 1392/2279 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10596 event pairs, 675 based on Foata normal form. 0/1955 useless extension candidates. Maximal degree in co-relation 5113. Up to 1494 conditions per place. [2023-08-29 19:44:27,583 INFO L137 encePairwiseOnDemand]: 330/334 looper letters, 66 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-29 19:44:27,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 348 flow [2023-08-29 19:44:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-29 19:44:27,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269461077844312 [2023-08-29 19:44:27,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-29 19:44:27,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-29 19:44:27,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:27,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-29 19:44:27,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:27,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:27,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:27,587 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 162 flow. Second operand 3 states and 528 transitions. [2023-08-29 19:44:27,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 348 flow [2023-08-29 19:44:27,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 331 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 19:44:27,589 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 149 flow [2023-08-29 19:44:27,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-29 19:44:27,590 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-29 19:44:27,590 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 149 flow [2023-08-29 19:44:27,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:27,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:27,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:27,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:27,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:27,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -168606173, now seen corresponding path program 1 times [2023-08-29 19:44:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:27,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766949587] [2023-08-29 19:44:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:27,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:27,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:27,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 19:44:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:44:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:27,864 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 19:44:27,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:27,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766949587] [2023-08-29 19:44:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766949587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:27,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:27,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:44:27,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078277156] [2023-08-29 19:44:27,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:27,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:27,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 334 [2023-08-29 19:44:27,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 149 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 19:44:27,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:27,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 334 [2023-08-29 19:44:27,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:28,064 INFO L130 PetriNetUnfolder]: 1487/2432 cut-off events. [2023-08-29 19:44:28,064 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2023-08-29 19:44:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 2432 events. 1487/2432 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11640 event pairs, 1076 based on Foata normal form. 66/2272 useless extension candidates. Maximal degree in co-relation 5700. Up to 2252 conditions per place. [2023-08-29 19:44:28,074 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 65 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-29 19:44:28,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 360 flow [2023-08-29 19:44:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-29 19:44:28,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229540918163673 [2023-08-29 19:44:28,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-29 19:44:28,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-29 19:44:28,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:28,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-29 19:44:28,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 19:44:28,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:28,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:28,079 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 149 flow. Second operand 3 states and 524 transitions. [2023-08-29 19:44:28,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 360 flow [2023-08-29 19:44:28,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:28,082 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 172 flow [2023-08-29 19:44:28,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-08-29 19:44:28,083 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-29 19:44:28,083 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 172 flow [2023-08-29 19:44:28,083 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 19:44:28,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:28,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:28,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:28,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:28,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1799743521, now seen corresponding path program 1 times [2023-08-29 19:44:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135057398] [2023-08-29 19:44:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:28,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:28,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 19:44:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:44:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:28,359 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 19:44:28,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:28,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135057398] [2023-08-29 19:44:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135057398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515994517] [2023-08-29 19:44:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 334 [2023-08-29 19:44:28,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:28,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 334 [2023-08-29 19:44:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:28,576 INFO L130 PetriNetUnfolder]: 1572/2563 cut-off events. [2023-08-29 19:44:28,577 INFO L131 PetriNetUnfolder]: For 737/737 co-relation queries the response was YES. [2023-08-29 19:44:28,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6256 conditions, 2563 events. 1572/2563 cut-off events. For 737/737 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13001 event pairs, 725 based on Foata normal form. 12/2279 useless extension candidates. Maximal degree in co-relation 6247. Up to 2249 conditions per place. [2023-08-29 19:44:28,583 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 73 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-29 19:44:28,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 395 flow [2023-08-29 19:44:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-29 19:44:28,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299401197604791 [2023-08-29 19:44:28,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-29 19:44:28,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-29 19:44:28,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:28,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-29 19:44:28,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:28,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:28,588 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 172 flow. Second operand 3 states and 531 transitions. [2023-08-29 19:44:28,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 395 flow [2023-08-29 19:44:28,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:44:28,591 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 174 flow [2023-08-29 19:44:28,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-29 19:44:28,591 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-29 19:44:28,591 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 174 flow [2023-08-29 19:44:28,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:28,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:28,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-29 19:44:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:28,800 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:28,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1551443432, now seen corresponding path program 1 times [2023-08-29 19:44:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509678548] [2023-08-29 19:44:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:28,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:28,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:28,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:28,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 19:44:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:44:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:28,886 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 19:44:28,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:28,917 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 19:44:28,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:28,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509678548] [2023-08-29 19:44:28,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509678548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:28,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:44:28,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 19:44:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056056792] [2023-08-29 19:44:28,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:44:28,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:44:28,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:44:28,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 334 [2023-08-29 19:44:28,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:28,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:28,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 334 [2023-08-29 19:44:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:29,777 INFO L130 PetriNetUnfolder]: 3718/6089 cut-off events. [2023-08-29 19:44:29,777 INFO L131 PetriNetUnfolder]: For 1996/1996 co-relation queries the response was YES. [2023-08-29 19:44:29,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15127 conditions, 6089 events. 3718/6089 cut-off events. For 1996/1996 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 32865 event pairs, 633 based on Foata normal form. 100/5439 useless extension candidates. Maximal degree in co-relation 15117. Up to 1333 conditions per place. [2023-08-29 19:44:29,793 INFO L137 encePairwiseOnDemand]: 327/334 looper letters, 281 selfloop transitions, 32 changer transitions 0/313 dead transitions. [2023-08-29 19:44:29,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 313 transitions, 1564 flow [2023-08-29 19:44:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:44:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:44:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2254 transitions. [2023-08-29 19:44:29,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191156149239982 [2023-08-29 19:44:29,798 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2254 transitions. [2023-08-29 19:44:29,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2254 transitions. [2023-08-29 19:44:29,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:29,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2254 transitions. [2023-08-29 19:44:29,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.3846153846154) internal successors, (2254), 13 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states 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 19:44:29,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 334.0) internal successors, (4676), 14 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states 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 19:44:29,806 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 334.0) internal successors, (4676), 14 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states 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 19:44:29,807 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 174 flow. Second operand 13 states and 2254 transitions. [2023-08-29 19:44:29,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 313 transitions, 1564 flow [2023-08-29 19:44:29,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 313 transitions, 1560 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:29,814 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 412 flow [2023-08-29 19:44:29,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=412, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2023-08-29 19:44:29,815 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-29 19:44:29,815 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 412 flow [2023-08-29 19:44:29,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:29,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:29,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:29,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:30,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:30,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:30,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:30,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1551444793, now seen corresponding path program 1 times [2023-08-29 19:44:30,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:30,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964339045] [2023-08-29 19:44:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:30,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:30,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:30,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 19:44:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 19:44:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:44:30,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:44:30,131 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 19:44:30,154 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-29 19:44:30,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-29 19:44:30,311 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 19:44:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:30,551 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 19:44:30,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964339045] [2023-08-29 19:44:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964339045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:30,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:44:30,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 19:44:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383364810] [2023-08-29 19:44:30,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:30,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:44:30,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:44:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:44:32,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 334 [2023-08-29 19:44:32,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 412 flow. Second operand has 10 states, 10 states have (on average 149.8) internal successors, (1498), 10 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states 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 19:44:32,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:32,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 334 [2023-08-29 19:44:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:34,163 INFO L130 PetriNetUnfolder]: 5478/8993 cut-off events. [2023-08-29 19:44:34,163 INFO L131 PetriNetUnfolder]: For 6785/6785 co-relation queries the response was YES. [2023-08-29 19:44:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24386 conditions, 8993 events. 5478/8993 cut-off events. For 6785/6785 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 52472 event pairs, 1603 based on Foata normal form. 90/7987 useless extension candidates. Maximal degree in co-relation 24373. Up to 5880 conditions per place. [2023-08-29 19:44:34,191 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 226 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2023-08-29 19:44:34,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 247 transitions, 1477 flow [2023-08-29 19:44:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:44:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:44:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1809 transitions. [2023-08-29 19:44:34,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49237887860642354 [2023-08-29 19:44:34,195 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1809 transitions. [2023-08-29 19:44:34,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1809 transitions. [2023-08-29 19:44:34,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:34,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1809 transitions. [2023-08-29 19:44:34,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.45454545454547) internal successors, (1809), 11 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 19:44:34,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states 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 19:44:34,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states 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 19:44:34,202 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 412 flow. Second operand 11 states and 1809 transitions. [2023-08-29 19:44:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 247 transitions, 1477 flow [2023-08-29 19:44:34,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 247 transitions, 1425 flow, removed 26 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:34,222 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 601 flow [2023-08-29 19:44:34,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=601, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2023-08-29 19:44:34,223 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-08-29 19:44:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 601 flow [2023-08-29 19:44:34,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.8) internal successors, (1498), 10 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states 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 19:44:34,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:34,224 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 19:44:34,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-29 19:44:34,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:34,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:34,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -845451240, now seen corresponding path program 1 times [2023-08-29 19:44:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:34,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909215309] [2023-08-29 19:44:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:34,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:34,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:34,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:34,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 19:44:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:44:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:34,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-08-29 19:44:34,516 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 19:44:34,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:34,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909215309] [2023-08-29 19:44:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909215309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:34,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197240867] [2023-08-29 19:44:34,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:34,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 334 [2023-08-29 19:44:34,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 601 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:34,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:34,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 334 [2023-08-29 19:44:34,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:34,748 INFO L130 PetriNetUnfolder]: 1414/2633 cut-off events. [2023-08-29 19:44:34,748 INFO L131 PetriNetUnfolder]: For 2377/2377 co-relation queries the response was YES. [2023-08-29 19:44:34,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 2633 events. 1414/2633 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 13596 event pairs, 235 based on Foata normal form. 120/2575 useless extension candidates. Maximal degree in co-relation 7250. Up to 2081 conditions per place. [2023-08-29 19:44:34,757 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 71 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2023-08-29 19:44:34,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 581 flow [2023-08-29 19:44:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-29 19:44:34,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069860279441117 [2023-08-29 19:44:34,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-29 19:44:34,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-29 19:44:34,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:34,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-29 19:44:34,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 19:44:34,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:34,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:34,761 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 601 flow. Second operand 3 states and 508 transitions. [2023-08-29 19:44:34,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 581 flow [2023-08-29 19:44:34,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 571 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 19:44:34,767 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 405 flow [2023-08-29 19:44:34,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=405, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-29 19:44:34,767 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-08-29 19:44:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 405 flow [2023-08-29 19:44:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:34,768 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 19:44:34,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:34,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:34,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2017272038, now seen corresponding path program 1 times [2023-08-29 19:44:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:34,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488735720] [2023-08-29 19:44:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:34,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:34,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 19:44:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:44:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:35,088 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 19:44:35,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:35,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488735720] [2023-08-29 19:44:35,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488735720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:35,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:44:35,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50072224] [2023-08-29 19:44:35,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:35,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:44:35,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:44:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:44:35,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 334 [2023-08-29 19:44:35,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 151.33333333333334) internal successors, (908), 6 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 19:44:35,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:35,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 334 [2023-08-29 19:44:35,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:35,651 INFO L130 PetriNetUnfolder]: 1746/3239 cut-off events. [2023-08-29 19:44:35,651 INFO L131 PetriNetUnfolder]: For 1869/1869 co-relation queries the response was YES. [2023-08-29 19:44:35,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9196 conditions, 3239 events. 1746/3239 cut-off events. For 1869/1869 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 17025 event pairs, 401 based on Foata normal form. 0/3167 useless extension candidates. Maximal degree in co-relation 9175. Up to 1556 conditions per place. [2023-08-29 19:44:35,662 INFO L137 encePairwiseOnDemand]: 327/334 looper letters, 101 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2023-08-29 19:44:35,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 811 flow [2023-08-29 19:44:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:44:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:44:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1109 transitions. [2023-08-29 19:44:35,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743370402053037 [2023-08-29 19:44:35,666 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1109 transitions. [2023-08-29 19:44:35,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1109 transitions. [2023-08-29 19:44:35,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:35,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1109 transitions. [2023-08-29 19:44:35,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.42857142857142) internal successors, (1109), 7 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states 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 19:44:35,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 334.0) internal successors, (2672), 8 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states 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 19:44:35,670 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 334.0) internal successors, (2672), 8 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states 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 19:44:35,671 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 405 flow. Second operand 7 states and 1109 transitions. [2023-08-29 19:44:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 811 flow [2023-08-29 19:44:35,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 797 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:35,678 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 423 flow [2023-08-29 19:44:35,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-08-29 19:44:35,678 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-08-29 19:44:35,678 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 423 flow [2023-08-29 19:44:35,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.33333333333334) internal successors, (908), 6 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 19:44:35,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:35,679 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 19:44:35,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:35,886 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:35,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2047413913, now seen corresponding path program 1 times [2023-08-29 19:44:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30116093] [2023-08-29 19:44:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:35,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:35,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:35,887 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:35,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 19:44:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:35,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:44:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:36,163 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 19:44:36,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:36,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:36,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30116093] [2023-08-29 19:44:36,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30116093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:36,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:36,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:44:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301979310] [2023-08-29 19:44:36,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:36,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:44:36,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:44:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:44:37,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 334 [2023-08-29 19:44:37,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 19:44:37,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:37,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 334 [2023-08-29 19:44:37,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:38,285 INFO L130 PetriNetUnfolder]: 2290/4275 cut-off events. [2023-08-29 19:44:38,286 INFO L131 PetriNetUnfolder]: For 2680/2680 co-relation queries the response was YES. [2023-08-29 19:44:38,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11946 conditions, 4275 events. 2290/4275 cut-off events. For 2680/2680 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 24341 event pairs, 683 based on Foata normal form. 38/4277 useless extension candidates. Maximal degree in co-relation 11924. Up to 2820 conditions per place. [2023-08-29 19:44:38,299 INFO L137 encePairwiseOnDemand]: 320/334 looper letters, 180 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2023-08-29 19:44:38,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 208 transitions, 1348 flow [2023-08-29 19:44:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:44:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:44:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2269 transitions. [2023-08-29 19:44:38,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528942115768463 [2023-08-29 19:44:38,304 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2269 transitions. [2023-08-29 19:44:38,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2269 transitions. [2023-08-29 19:44:38,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:38,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2269 transitions. [2023-08-29 19:44:38,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 151.26666666666668) internal successors, (2269), 15 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states 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 19:44:38,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 334.0) internal successors, (5344), 16 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 19:44:38,312 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 334.0) internal successors, (5344), 16 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 19:44:38,312 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 423 flow. Second operand 15 states and 2269 transitions. [2023-08-29 19:44:38,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 208 transitions, 1348 flow [2023-08-29 19:44:38,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 208 transitions, 1329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:44:38,322 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 696 flow [2023-08-29 19:44:38,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=696, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2023-08-29 19:44:38,322 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2023-08-29 19:44:38,322 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 696 flow [2023-08-29 19:44:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 19:44:38,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:38,323 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 19:44:38,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:38,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:38,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2103713829, now seen corresponding path program 1 times [2023-08-29 19:44:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684731099] [2023-08-29 19:44:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:38,532 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:38,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 19:44:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:38,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:44:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:38,603 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 19:44:38,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:38,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:38,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684731099] [2023-08-29 19:44:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684731099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:38,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:44:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86210120] [2023-08-29 19:44:38,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:38,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:44:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:44:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:44:38,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 334 [2023-08-29 19:44:38,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 696 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:38,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:38,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 334 [2023-08-29 19:44:38,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:39,059 INFO L130 PetriNetUnfolder]: 2669/5002 cut-off events. [2023-08-29 19:44:39,059 INFO L131 PetriNetUnfolder]: For 6321/6321 co-relation queries the response was YES. [2023-08-29 19:44:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15750 conditions, 5002 events. 2669/5002 cut-off events. For 6321/6321 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 29900 event pairs, 1846 based on Foata normal form. 112/5060 useless extension candidates. Maximal degree in co-relation 15716. Up to 4222 conditions per place. [2023-08-29 19:44:39,077 INFO L137 encePairwiseOnDemand]: 330/334 looper letters, 147 selfloop transitions, 3 changer transitions 0/150 dead transitions. [2023-08-29 19:44:39,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 150 transitions, 1373 flow [2023-08-29 19:44:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:44:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:44:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-08-29 19:44:39,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530938123752495 [2023-08-29 19:44:39,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-08-29 19:44:39,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-08-29 19:44:39,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:39,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-08-29 19:44:39,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 19:44:39,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:39,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 19:44:39,081 INFO L175 Difference]: Start difference. First operand has 103 places, 94 transitions, 696 flow. Second operand 3 states and 532 transitions. [2023-08-29 19:44:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 150 transitions, 1373 flow [2023-08-29 19:44:39,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1361 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:39,100 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 705 flow [2023-08-29 19:44:39,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=705, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2023-08-29 19:44:39,100 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2023-08-29 19:44:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 705 flow [2023-08-29 19:44:39,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:39,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:39,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:39,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-29 19:44:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:39,307 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:39,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1470624234, now seen corresponding path program 1 times [2023-08-29 19:44:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678074703] [2023-08-29 19:44:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:39,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:39,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:39,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 19:44:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 19:44:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:39,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:44:39,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:44:39,739 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 19:44:39,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:39,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678074703] [2023-08-29 19:44:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678074703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:44:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249450783] [2023-08-29 19:44:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:44:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:44:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:44:40,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 334 [2023-08-29 19:44:40,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 705 flow. Second operand has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:40,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:40,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 334 [2023-08-29 19:44:40,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:42,556 INFO L130 PetriNetUnfolder]: 3322/6244 cut-off events. [2023-08-29 19:44:42,556 INFO L131 PetriNetUnfolder]: For 7877/7877 co-relation queries the response was YES. [2023-08-29 19:44:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20683 conditions, 6244 events. 3322/6244 cut-off events. For 7877/7877 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 38758 event pairs, 1076 based on Foata normal form. 12/6256 useless extension candidates. Maximal degree in co-relation 20647. Up to 4737 conditions per place. [2023-08-29 19:44:42,577 INFO L137 encePairwiseOnDemand]: 318/334 looper letters, 225 selfloop transitions, 44 changer transitions 0/269 dead transitions. [2023-08-29 19:44:42,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 269 transitions, 2058 flow [2023-08-29 19:44:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 19:44:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 19:44:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3115 transitions. [2023-08-29 19:44:42,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054933611038792 [2023-08-29 19:44:42,583 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3115 transitions. [2023-08-29 19:44:42,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3115 transitions. [2023-08-29 19:44:42,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:42,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3115 transitions. [2023-08-29 19:44:42,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 135.43478260869566) internal successors, (3115), 23 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states 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 19:44:42,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 334.0) internal successors, (8016), 24 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states 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 19:44:42,594 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 334.0) internal successors, (8016), 24 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states 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 19:44:42,595 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 705 flow. Second operand 23 states and 3115 transitions. [2023-08-29 19:44:42,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 269 transitions, 2058 flow [2023-08-29 19:44:42,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 269 transitions, 2039 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 19:44:42,620 INFO L231 Difference]: Finished difference. Result has 144 places, 137 transitions, 1213 flow [2023-08-29 19:44:42,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1213, PETRI_PLACES=144, PETRI_TRANSITIONS=137} [2023-08-29 19:44:42,620 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2023-08-29 19:44:42,620 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 1213 flow [2023-08-29 19:44:42,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:42,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:42,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:42,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:42,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:42,828 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 19:44:42,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1183194962, now seen corresponding path program 2 times [2023-08-29 19:44:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:42,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396628088] [2023-08-29 19:44:42,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:44:42,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:42,830 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:42,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 19:44:42,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 19:44:42,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 19:44:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:42,951 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-29 19:44:42,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-29 19:44:43,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:44:43,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:44:43,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:44:43,327 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 19:44:43,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:43,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396628088] [2023-08-29 19:44:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396628088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:43,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:43,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:44:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864444762] [2023-08-29 19:44:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:44:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:44:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:44:44,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 334 [2023-08-29 19:44:44,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 137 transitions, 1213 flow. Second operand has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:44,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:44,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 334 [2023-08-29 19:44:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:46,396 INFO L130 PetriNetUnfolder]: 3917/7358 cut-off events. [2023-08-29 19:44:46,396 INFO L131 PetriNetUnfolder]: For 11364/11364 co-relation queries the response was YES. [2023-08-29 19:44:46,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25716 conditions, 7358 events. 3917/7358 cut-off events. For 11364/11364 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46655 event pairs, 1415 based on Foata normal form. 6/7364 useless extension candidates. Maximal degree in co-relation 25663. Up to 5729 conditions per place. [2023-08-29 19:44:46,428 INFO L137 encePairwiseOnDemand]: 318/334 looper letters, 227 selfloop transitions, 41 changer transitions 0/268 dead transitions. [2023-08-29 19:44:46,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 268 transitions, 2457 flow [2023-08-29 19:44:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:44:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:44:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2014 transitions. [2023-08-29 19:44:46,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40199600798403196 [2023-08-29 19:44:46,432 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2014 transitions. [2023-08-29 19:44:46,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2014 transitions. [2023-08-29 19:44:46,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:46,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2014 transitions. [2023-08-29 19:44:46,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.26666666666668) internal successors, (2014), 15 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states 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 19:44:46,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 334.0) internal successors, (5344), 16 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 19:44:46,440 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 334.0) internal successors, (5344), 16 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 19:44:46,440 INFO L175 Difference]: Start difference. First operand has 144 places, 137 transitions, 1213 flow. Second operand 15 states and 2014 transitions. [2023-08-29 19:44:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 268 transitions, 2457 flow [2023-08-29 19:44:46,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 268 transitions, 2427 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-29 19:44:46,488 INFO L231 Difference]: Finished difference. Result has 168 places, 164 transitions, 1634 flow [2023-08-29 19:44:46,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1634, PETRI_PLACES=168, PETRI_TRANSITIONS=164} [2023-08-29 19:44:46,488 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 119 predicate places. [2023-08-29 19:44:46,488 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 164 transitions, 1634 flow [2023-08-29 19:44:46,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:46,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:46,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:46,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-29 19:44:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:46,698 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:46,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1442702302, now seen corresponding path program 3 times [2023-08-29 19:44:46,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:46,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457216638] [2023-08-29 19:44:46,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:44:46,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:46,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:46,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 19:44:46,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 19:44:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:44:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 19:44:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:46,823 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-29 19:44:46,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-29 19:44:46,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:44:47,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:44:47,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:44:47,190 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 19:44:47,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:44:47,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457216638] [2023-08-29 19:44:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457216638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:44:47,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:44:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:44:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712725262] [2023-08-29 19:44:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:44:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:44:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:44:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:44:48,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 334 [2023-08-29 19:44:48,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 164 transitions, 1634 flow. Second operand has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:48,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:48,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 334 [2023-08-29 19:44:48,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:50,549 INFO L130 PetriNetUnfolder]: 3905/7334 cut-off events. [2023-08-29 19:44:50,549 INFO L131 PetriNetUnfolder]: For 13347/13347 co-relation queries the response was YES. [2023-08-29 19:44:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26534 conditions, 7334 events. 3905/7334 cut-off events. For 13347/13347 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46467 event pairs, 1109 based on Foata normal form. 12/7346 useless extension candidates. Maximal degree in co-relation 26470. Up to 3557 conditions per place. [2023-08-29 19:44:50,596 INFO L137 encePairwiseOnDemand]: 318/334 looper letters, 187 selfloop transitions, 100 changer transitions 0/287 dead transitions. [2023-08-29 19:44:50,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 287 transitions, 2728 flow [2023-08-29 19:44:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 19:44:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 19:44:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2902 transitions. [2023-08-29 19:44:50,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949373979314099 [2023-08-29 19:44:50,599 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2902 transitions. [2023-08-29 19:44:50,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2902 transitions. [2023-08-29 19:44:50,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:50,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2902 transitions. [2023-08-29 19:44:50,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.9090909090909) internal successors, (2902), 22 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states 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 19:44:50,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 334.0) internal successors, (7682), 23 states have internal predecessors, (7682), 0 states have call successors, (0), 0 states 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 19:44:50,607 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 334.0) internal successors, (7682), 23 states have internal predecessors, (7682), 0 states have call successors, (0), 0 states 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 19:44:50,607 INFO L175 Difference]: Start difference. First operand has 168 places, 164 transitions, 1634 flow. Second operand 22 states and 2902 transitions. [2023-08-29 19:44:50,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 287 transitions, 2728 flow [2023-08-29 19:44:50,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 287 transitions, 2709 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 19:44:50,664 INFO L231 Difference]: Finished difference. Result has 192 places, 177 transitions, 1990 flow [2023-08-29 19:44:50,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1990, PETRI_PLACES=192, PETRI_TRANSITIONS=177} [2023-08-29 19:44:50,665 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2023-08-29 19:44:50,665 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 177 transitions, 1990 flow [2023-08-29 19:44:50,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:44:50,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:50,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:50,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-29 19:44:50,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:50,873 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:50,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1235395366, now seen corresponding path program 1 times [2023-08-29 19:44:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:50,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537527289] [2023-08-29 19:44:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:50,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:50,917 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:50,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 19:44:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:44:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:44:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:44:51,001 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 19:44:51,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:44:51,016 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 19:44:51,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:44:51,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537527289] [2023-08-29 19:44:51,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537527289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:44:51,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:44:51,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-29 19:44:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249192409] [2023-08-29 19:44:51,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:44:51,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:44:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:44:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:44:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:44:51,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 334 [2023-08-29 19:44:51,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 177 transitions, 1990 flow. Second operand has 6 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 19:44:51,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:44:51,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 334 [2023-08-29 19:44:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:44:53,041 INFO L130 PetriNetUnfolder]: 7235/14016 cut-off events. [2023-08-29 19:44:53,041 INFO L131 PetriNetUnfolder]: For 33724/33724 co-relation queries the response was YES. [2023-08-29 19:44:53,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53285 conditions, 14016 events. 7235/14016 cut-off events. For 33724/33724 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 105886 event pairs, 2263 based on Foata normal form. 1904/15920 useless extension candidates. Maximal degree in co-relation 53214. Up to 3932 conditions per place. [2023-08-29 19:44:53,123 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 540 selfloop transitions, 22 changer transitions 0/562 dead transitions. [2023-08-29 19:44:53,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 562 transitions, 7239 flow [2023-08-29 19:44:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:44:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:44:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1068 transitions. [2023-08-29 19:44:53,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329341317365269 [2023-08-29 19:44:53,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1068 transitions. [2023-08-29 19:44:53,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1068 transitions. [2023-08-29 19:44:53,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:44:53,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1068 transitions. [2023-08-29 19:44:53,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 19:44:53,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 19:44:53,129 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 19:44:53,129 INFO L175 Difference]: Start difference. First operand has 192 places, 177 transitions, 1990 flow. Second operand 6 states and 1068 transitions. [2023-08-29 19:44:53,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 562 transitions, 7239 flow [2023-08-29 19:44:53,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 562 transitions, 6721 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-08-29 19:44:53,296 INFO L231 Difference]: Finished difference. Result has 189 places, 188 transitions, 2036 flow [2023-08-29 19:44:53,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2036, PETRI_PLACES=189, PETRI_TRANSITIONS=188} [2023-08-29 19:44:53,296 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 140 predicate places. [2023-08-29 19:44:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 188 transitions, 2036 flow [2023-08-29 19:44:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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 19:44:53,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:44:53,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:53,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:53,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:53,497 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:44:53,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:44:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2012380858, now seen corresponding path program 1 times [2023-08-29 19:44:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:44:53,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464249976] [2023-08-29 19:44:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:44:53,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:53,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:44:53,499 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:44:53,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 19:44:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:44:53,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:44:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:44:53,699 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 19:44:53,699 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:44:53,699 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:44:53,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:44:53,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:44:53,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:44:53,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:44:53,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:44:53,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:44:53,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:44:53,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:44:53,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:44:53,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:44:53,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:44:53,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:44:53,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:44:53,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:44:53,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 19:44:53,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:44:53,913 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:44:53,917 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:44:53,917 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:44:53,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:44:53 BasicIcfg [2023-08-29 19:44:53,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:44:53,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:44:53,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:44:53,947 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:44:53,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:44:16" (3/4) ... [2023-08-29 19:44:53,949 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:44:53,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:44:53,949 INFO L158 Benchmark]: Toolchain (without parser) took 38766.11ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 43.7MB in the beginning and 669.3MB in the end (delta: -625.6MB). Peak memory consumption was 511.5MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,950 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 73.4MB. Free memory was 50.0MB in the beginning and 50.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:44:53,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.04ms. Allocated memory is still 73.4MB. Free memory was 43.5MB in the beginning and 33.7MB in the end (delta: 9.8MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.34ms. Allocated memory is still 73.4MB. Free memory was 33.7MB in the beginning and 31.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,950 INFO L158 Benchmark]: Boogie Preprocessor took 28.37ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 31.0MB in the beginning and 70.3MB in the end (delta: -39.3MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,951 INFO L158 Benchmark]: RCFGBuilder took 516.14ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 48.8MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,951 INFO L158 Benchmark]: TraceAbstraction took 37812.39ms. Allocated memory was 92.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 48.3MB in the beginning and 670.4MB in the end (delta: -622.0MB). Peak memory consumption was 498.3MB. Max. memory is 16.1GB. [2023-08-29 19:44:53,951 INFO L158 Benchmark]: Witness Printer took 2.25ms. Allocated memory is still 1.2GB. Free memory is still 669.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:44:53,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 73.4MB. Free memory was 50.0MB in the beginning and 50.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.04ms. Allocated memory is still 73.4MB. Free memory was 43.5MB in the beginning and 33.7MB in the end (delta: 9.8MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.34ms. Allocated memory is still 73.4MB. Free memory was 33.7MB in the beginning and 31.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.37ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 31.0MB in the beginning and 70.3MB in the end (delta: -39.3MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * RCFGBuilder took 516.14ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 48.8MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 37812.39ms. Allocated memory was 92.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 48.3MB in the beginning and 670.4MB in the end (delta: -622.0MB). Peak memory consumption was 498.3MB. Max. memory is 16.1GB. * Witness Printer took 2.25ms. Allocated memory is still 1.2GB. Free memory is still 669.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 161 PlacesBefore, 49 PlacesAfterwards, 164 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 96 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 164 TotalNumberOfCompositions, 13555 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8863, independent: 8632, independent conditional: 0, independent unconditional: 8632, dependent: 231, dependent conditional: 0, dependent unconditional: 231, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4612, independent: 4564, independent conditional: 0, independent unconditional: 4564, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8863, independent: 4068, independent conditional: 0, independent unconditional: 4068, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 4612, unknown conditional: 0, unknown unconditional: 4612] , Statistics on independence cache: Total cache size (in pairs): 268, Positive cache size: 248, Positive conditional cache size: 0, Positive unconditional cache size: 248, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 261 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.6s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4679 SdHoareTripleChecker+Valid, 13.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3905 mSDsluCounter, 5862 SdHoareTripleChecker+Invalid, 11.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5711 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18371 IncrementalHoareTripleChecker+Invalid, 18549 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 151 mSDtfsCounter, 18371 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 366 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2036occurred in iteration=21, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 5 QuantifiedInterpolants, 2356 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2051 ConjunctsInSsa, 206 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:44:53,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample