./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 03:43:46,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:43:46,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:43:46,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:43:46,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:43:46,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:43:46,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:43:46,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:43:46,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:43:46,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:43:46,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:43:46,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:43:46,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:43:46,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:43:46,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:43:46,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:43:46,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:43:46,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:43:46,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:43:46,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:43:46,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:43:46,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:43:46,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:43:46,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:43:46,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:43:46,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:43:46,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:43:46,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:43:46,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:43:46,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:43:46,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:43:46,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:43:46,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:43:46,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:43:46,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:43:46,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:43:46,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:43:46,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:43:46,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:43:46,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:43:46,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:43:46,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:43:47,007 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:43:47,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:43:47,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:43:47,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:43:47,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:43:47,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:43:47,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:43:47,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:43:47,011 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:43:47,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:43:47,012 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:43:47,012 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:43:47,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:43:47,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:43:47,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:43:47,013 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:43:47,013 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:43:47,013 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:43:47,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:43:47,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:43:47,014 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:43:47,014 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:43:47,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:43:47,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:43:47,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:43:47,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:43:47,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:43:47,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:43:47,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:43:47,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:43:47,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:43:47,016 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:43:47,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:43:47,016 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:43:47,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:43:47,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:43:47,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:43:47,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:43:47,355 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:43:47,355 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:43:47,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-30 03:43:48,604 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:43:48,904 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:43:48,905 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-30 03:43:48,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e300b6bf/dd59597b9c16451e9bd05bd99918dfee/FLAG0a86ce081 [2023-08-30 03:43:48,943 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e300b6bf/dd59597b9c16451e9bd05bd99918dfee [2023-08-30 03:43:48,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:43:48,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:43:48,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:43:48,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:43:48,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:43:48,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:48" (1/1) ... [2023-08-30 03:43:48,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2554048b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:48, skipping insertion in model container [2023-08-30 03:43:48,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:48" (1/1) ... [2023-08-30 03:43:48,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:43:49,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:43:49,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:43:49,451 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:43:49,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:43:49,548 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:43:49,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49 WrapperNode [2023-08-30 03:43:49,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:43:49,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:43:49,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:43:49,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:43:49,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,609 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-08-30 03:43:49,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:43:49,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:43:49,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:43:49,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:43:49,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,641 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:43:49,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:43:49,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:43:49,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:43:49,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (1/1) ... [2023-08-30 03:43:49,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:43:49,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:49,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 03:43:49,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 03:43:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:43:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:43:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:43:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:43:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 03:43:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:43:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 03:43:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 03:43:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:43:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:43:49,726 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 03:43:49,919 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:43:49,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:43:50,083 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:43:50,089 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:43:50,089 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 03:43:50,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:50 BoogieIcfgContainer [2023-08-30 03:43:50,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:43:50,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:43:50,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:43:50,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:43:50,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:43:48" (1/3) ... [2023-08-30 03:43:50,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3188af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:50, skipping insertion in model container [2023-08-30 03:43:50,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:49" (2/3) ... [2023-08-30 03:43:50,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3188af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:50, skipping insertion in model container [2023-08-30 03:43:50,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:50" (3/3) ... [2023-08-30 03:43:50,102 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-08-30 03:43:50,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:43:50,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 03:43:50,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:43:50,188 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:43:50,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 98 transitions, 201 flow [2023-08-30 03:43:50,251 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-08-30 03:43:50,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:50,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-30 03:43:50,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 98 transitions, 201 flow [2023-08-30 03:43:50,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 97 transitions, 197 flow [2023-08-30 03:43:50,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:43:50,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 97 transitions, 197 flow [2023-08-30 03:43:50,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 97 transitions, 197 flow [2023-08-30 03:43:50,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 97 transitions, 197 flow [2023-08-30 03:43:50,297 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-08-30 03:43:50,297 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:50,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-30 03:43:50,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 2430 [2023-08-30 03:43:52,435 INFO L134 LiptonReduction]: Checked pairs total: 3471 [2023-08-30 03:43:52,436 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-30 03:43:52,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:43:52,458 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;@76ce7683, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:43:52,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 03:43:52,460 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 03:43:52,460 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:52,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:52,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 03:43:52,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:52,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash 12213, now seen corresponding path program 1 times [2023-08-30 03:43:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:52,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385186377] [2023-08-30 03:43:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:52,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:52,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:52,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385186377] [2023-08-30 03:43:52,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385186377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:52,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:52,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:43:52,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299814430] [2023-08-30 03:43:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:43:52,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:43:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:43:52,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 197 [2023-08-30 03:43:52,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:52,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:52,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 197 [2023-08-30 03:43:52,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:52,761 INFO L130 PetriNetUnfolder]: 122/252 cut-off events. [2023-08-30 03:43:52,767 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:52,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 252 events. 122/252 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1040 event pairs, 98 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 488. Up to 245 conditions per place. [2023-08-30 03:43:52,772 INFO L137 encePairwiseOnDemand]: 190/197 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-08-30 03:43:52,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 113 flow [2023-08-30 03:43:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:43:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:43:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 222 transitions. [2023-08-30 03:43:52,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634517766497462 [2023-08-30 03:43:52,792 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 222 transitions. [2023-08-30 03:43:52,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 222 transitions. [2023-08-30 03:43:52,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:52,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 222 transitions. [2023-08-30 03:43:52,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:52,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:52,809 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:52,811 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 2 states and 222 transitions. [2023-08-30 03:43:52,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 113 flow [2023-08-30 03:43:52,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:52,815 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 58 flow [2023-08-30 03:43:52,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-30 03:43:52,823 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-08-30 03:43:52,823 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 58 flow [2023-08-30 03:43:52,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:52,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:52,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 03:43:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:43:52,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:52,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 364060967, now seen corresponding path program 1 times [2023-08-30 03:43:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:52,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066681896] [2023-08-30 03:43:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:52,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:52,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066681896] [2023-08-30 03:43:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066681896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:53,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:53,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:43:53,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791186319] [2023-08-30 03:43:53,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:43:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:43:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:43:53,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-08-30 03:43:53,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:53,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-08-30 03:43:53,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:53,089 INFO L130 PetriNetUnfolder]: 122/253 cut-off events. [2023-08-30 03:43:53,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 253 events. 122/253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 500. Up to 245 conditions per place. [2023-08-30 03:43:53,095 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-30 03:43:53,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 116 flow [2023-08-30 03:43:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:43:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:43:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-30 03:43:53,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505922165820643 [2023-08-30 03:43:53,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-30 03:43:53,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-30 03:43:53,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:53,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-30 03:43:53,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,107 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 58 flow. Second operand 3 states and 299 transitions. [2023-08-30 03:43:53,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 116 flow [2023-08-30 03:43:53,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:43:53,108 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 70 flow [2023-08-30 03:43:53,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-30 03:43:53,109 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-08-30 03:43:53,110 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 70 flow [2023-08-30 03:43:53,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:53,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 03:43:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:43:53,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:53,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1599281575, now seen corresponding path program 1 times [2023-08-30 03:43:53,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:53,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096930510] [2023-08-30 03:43:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:53,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096930510] [2023-08-30 03:43:53,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096930510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:53,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943707148] [2023-08-30 03:43:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:53,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:53,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:43:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 03:43:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:43:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:53,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943707148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:53,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:53,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 03:43:53,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082608826] [2023-08-30 03:43:53,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:43:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:43:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:43:53,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-30 03:43:53,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:53,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-30 03:43:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:53,488 INFO L130 PetriNetUnfolder]: 122/256 cut-off events. [2023-08-30 03:43:53,491 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:53,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 256 events. 122/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 514. Up to 245 conditions per place. [2023-08-30 03:43:53,494 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-30 03:43:53,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 144 flow [2023-08-30 03:43:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:43:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:43:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 568 transitions. [2023-08-30 03:43:53,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805414551607445 [2023-08-30 03:43:53,496 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 568 transitions. [2023-08-30 03:43:53,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 568 transitions. [2023-08-30 03:43:53,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:53,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 568 transitions. [2023-08-30 03:43:53,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.66666666666667) internal successors, (568), 6 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,503 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,503 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 6 states and 568 transitions. [2023-08-30 03:43:53,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 144 flow [2023-08-30 03:43:53,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 140 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:53,505 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 102 flow [2023-08-30 03:43:53,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-30 03:43:53,508 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-30 03:43:53,508 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 102 flow [2023-08-30 03:43:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:53,513 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 03:43:53,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 03:43:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:53,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:53,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash -392962649, now seen corresponding path program 2 times [2023-08-30 03:43:53,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:53,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679932614] [2023-08-30 03:43:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:53,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679932614] [2023-08-30 03:43:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679932614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941259838] [2023-08-30 03:43:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:43:53,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:53,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:53,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:43:53,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 03:43:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:43:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:43:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 03:43:53,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:54,073 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 03:43:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 03:43:54,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:43:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941259838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:54,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:43:54,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-30 03:43:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494389717] [2023-08-30 03:43:54,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:54,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:54,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 03:43:54,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 03:43:54,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:54,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 03:43:54,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:54,418 INFO L130 PetriNetUnfolder]: 184/400 cut-off events. [2023-08-30 03:43:54,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 03:43:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 400 events. 184/400 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1852 event pairs, 91 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 792. Up to 232 conditions per place. [2023-08-30 03:43:54,421 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-30 03:43:54,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 236 flow [2023-08-30 03:43:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:43:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:43:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 393 transitions. [2023-08-30 03:43:54,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-08-30 03:43:54,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 393 transitions. [2023-08-30 03:43:54,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 393 transitions. [2023-08-30 03:43:54,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:54,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 393 transitions. [2023-08-30 03:43:54,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,428 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 102 flow. Second operand 4 states and 393 transitions. [2023-08-30 03:43:54,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 236 flow [2023-08-30 03:43:54,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 222 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:54,431 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 102 flow [2023-08-30 03:43:54,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-30 03:43:54,433 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 03:43:54,433 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 102 flow [2023-08-30 03:43:54,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:54,433 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 03:43:54,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 03:43:54,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 03:43:54,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:54,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:54,639 INFO L85 PathProgramCache]: Analyzing trace with hash -392962415, now seen corresponding path program 1 times [2023-08-30 03:43:54,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:54,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331428419] [2023-08-30 03:43:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 03:43:54,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:54,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331428419] [2023-08-30 03:43:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331428419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:54,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:54,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:43:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400951766] [2023-08-30 03:43:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:43:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:43:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:43:54,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-30 03:43:54,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:54,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-30 03:43:54,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:54,816 INFO L130 PetriNetUnfolder]: 262/532 cut-off events. [2023-08-30 03:43:54,818 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-30 03:43:54,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 532 events. 262/532 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2425 event pairs, 156 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1194. Up to 373 conditions per place. [2023-08-30 03:43:54,822 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 03:43:54,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 236 flow [2023-08-30 03:43:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:43:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:43:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-30 03:43:54,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228426395939086 [2023-08-30 03:43:54,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-30 03:43:54,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-30 03:43:54,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:54,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-30 03:43:54,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,828 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 102 flow. Second operand 3 states and 309 transitions. [2023-08-30 03:43:54,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 236 flow [2023-08-30 03:43:54,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:54,831 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 112 flow [2023-08-30 03:43:54,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 03:43:54,837 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 03:43:54,837 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 112 flow [2023-08-30 03:43:54,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:54,838 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 03:43:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 03:43:54,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:54,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -392962399, now seen corresponding path program 1 times [2023-08-30 03:43:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:54,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853725907] [2023-08-30 03:43:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:54,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:54,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:54,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853725907] [2023-08-30 03:43:54,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853725907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:54,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751383989] [2023-08-30 03:43:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:54,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:54,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:43:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 03:43:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:43:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:55,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:43:55,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751383989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:55,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 03:43:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673167142] [2023-08-30 03:43:55,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:43:55,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:43:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:43:55,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-30 03:43:55,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:55,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-30 03:43:55,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:55,220 INFO L130 PetriNetUnfolder]: 262/553 cut-off events. [2023-08-30 03:43:55,220 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-30 03:43:55,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 553 events. 262/553 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2459 event pairs, 228 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 1290. Up to 525 conditions per place. [2023-08-30 03:43:55,223 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 27 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2023-08-30 03:43:55,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 224 flow [2023-08-30 03:43:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:43:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:43:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1110 transitions. [2023-08-30 03:43:55,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46954314720812185 [2023-08-30 03:43:55,227 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1110 transitions. [2023-08-30 03:43:55,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1110 transitions. [2023-08-30 03:43:55,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:55,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1110 transitions. [2023-08-30 03:43:55,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.5) internal successors, (1110), 12 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,235 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,235 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 112 flow. Second operand 12 states and 1110 transitions. [2023-08-30 03:43:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 224 flow [2023-08-30 03:43:55,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:55,240 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 194 flow [2023-08-30 03:43:55,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-08-30 03:43:55,242 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-08-30 03:43:55,242 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 194 flow [2023-08-30 03:43:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:55,243 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-30 03:43:55,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 03:43:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:55,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:55,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534879, now seen corresponding path program 2 times [2023-08-30 03:43:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:55,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806750347] [2023-08-30 03:43:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:55,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806750347] [2023-08-30 03:43:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806750347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:55,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:43:55,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64131009] [2023-08-30 03:43:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:55,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:43:55,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:43:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:43:55,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-08-30 03:43:55,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:55,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-08-30 03:43:55,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:55,727 INFO L130 PetriNetUnfolder]: 223/472 cut-off events. [2023-08-30 03:43:55,728 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 03:43:55,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 472 events. 223/472 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1969 event pairs, 168 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1114. Up to 404 conditions per place. [2023-08-30 03:43:55,731 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-30 03:43:55,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 306 flow [2023-08-30 03:43:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:43:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:43:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-30 03:43:55,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143824027072758 [2023-08-30 03:43:55,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-30 03:43:55,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-30 03:43:55,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:55,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-30 03:43:55,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,754 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 194 flow. Second operand 3 states and 304 transitions. [2023-08-30 03:43:55,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 306 flow [2023-08-30 03:43:55,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 258 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 03:43:55,757 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2023-08-30 03:43:55,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-30 03:43:55,757 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-08-30 03:43:55,758 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2023-08-30 03:43:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:55,758 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-30 03:43:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:43:55,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:55,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534878, now seen corresponding path program 1 times [2023-08-30 03:43:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:55,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400922361] [2023-08-30 03:43:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400922361] [2023-08-30 03:43:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400922361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:55,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:55,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:43:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888114441] [2023-08-30 03:43:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:43:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-08-30 03:43:56,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:56,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-08-30 03:43:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:56,102 INFO L130 PetriNetUnfolder]: 210/434 cut-off events. [2023-08-30 03:43:56,103 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-30 03:43:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 434 events. 210/434 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1765 event pairs, 132 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 1048. Up to 326 conditions per place. [2023-08-30 03:43:56,106 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-30 03:43:56,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 276 flow [2023-08-30 03:43:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:43:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:43:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-08-30 03:43:56,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784263959390863 [2023-08-30 03:43:56,108 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-08-30 03:43:56,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-08-30 03:43:56,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:56,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-08-30 03:43:56,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,111 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 4 states and 377 transitions. [2023-08-30 03:43:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 276 flow [2023-08-30 03:43:56,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:56,113 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 150 flow [2023-08-30 03:43:56,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-08-30 03:43:56,114 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-08-30 03:43:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 150 flow [2023-08-30 03:43:56,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:56,115 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 03:43:56,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:43:56,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:56,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1106817676, now seen corresponding path program 1 times [2023-08-30 03:43:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613994050] [2023-08-30 03:43:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:56,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613994050] [2023-08-30 03:43:56,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613994050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:56,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:56,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:43:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086926972] [2023-08-30 03:43:56,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:56,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:43:56,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 197 [2023-08-30 03:43:56,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:56,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 197 [2023-08-30 03:43:56,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:56,414 INFO L130 PetriNetUnfolder]: 180/388 cut-off events. [2023-08-30 03:43:56,414 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-30 03:43:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 388 events. 180/388 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1535 event pairs, 13 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 978. Up to 266 conditions per place. [2023-08-30 03:43:56,416 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2023-08-30 03:43:56,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 370 flow [2023-08-30 03:43:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 03:43:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 03:43:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 473 transitions. [2023-08-30 03:43:56,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48020304568527916 [2023-08-30 03:43:56,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 473 transitions. [2023-08-30 03:43:56,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 473 transitions. [2023-08-30 03:43:56,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:56,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 473 transitions. [2023-08-30 03:43:56,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,422 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 150 flow. Second operand 5 states and 473 transitions. [2023-08-30 03:43:56,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 370 flow [2023-08-30 03:43:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 03:43:56,425 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 216 flow [2023-08-30 03:43:56,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-30 03:43:56,425 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-30 03:43:56,426 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 216 flow [2023-08-30 03:43:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:56,426 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:43:56,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 03:43:56,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:43:56,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:56,427 INFO L85 PathProgramCache]: Analyzing trace with hash -522908067, now seen corresponding path program 1 times [2023-08-30 03:43:56,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:56,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358793877] [2023-08-30 03:43:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358793877] [2023-08-30 03:43:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358793877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469662226] [2023-08-30 03:43:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:56,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:56,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:43:56,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 03:43:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 03:43:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:56,897 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 03:43:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:56,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:43:59,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469662226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:59,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 03:43:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046912414] [2023-08-30 03:43:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:59,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 03:43:59,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 03:43:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:43:59,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 03:43:59,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 216 flow. Second operand has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:59,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:59,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 03:43:59,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:00,246 INFO L130 PetriNetUnfolder]: 312/652 cut-off events. [2023-08-30 03:44:00,247 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-08-30 03:44:00,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 652 events. 312/652 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2480 event pairs, 100 based on Foata normal form. 66/707 useless extension candidates. Maximal degree in co-relation 1902. Up to 296 conditions per place. [2023-08-30 03:44:00,251 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 96 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-08-30 03:44:00,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 668 flow [2023-08-30 03:44:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:44:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:44:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 729 transitions. [2023-08-30 03:44:00,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256345177664976 [2023-08-30 03:44:00,254 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 729 transitions. [2023-08-30 03:44:00,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 729 transitions. [2023-08-30 03:44:00,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:00,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 729 transitions. [2023-08-30 03:44:00,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:00,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:00,260 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:00,260 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 216 flow. Second operand 8 states and 729 transitions. [2023-08-30 03:44:00,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 668 flow [2023-08-30 03:44:00,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:44:00,264 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 268 flow [2023-08-30 03:44:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-08-30 03:44:00,266 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-08-30 03:44:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 268 flow [2023-08-30 03:44:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:00,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:00,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:00,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:00,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash -740396165, now seen corresponding path program 1 times [2023-08-30 03:44:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22607029] [2023-08-30 03:44:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:00,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:00,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:00,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22607029] [2023-08-30 03:44:00,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22607029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:00,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696363470] [2023-08-30 03:44:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:00,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:00,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:00,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:00,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 03:44:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 03:44:00,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:00,921 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 03:44:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:00,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696363470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:03,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:03,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 03:44:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387850335] [2023-08-30 03:44:03,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:03,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 03:44:03,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:03,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 03:44:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:44:03,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-30 03:44:03,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:03,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-30 03:44:03,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:04,229 INFO L130 PetriNetUnfolder]: 648/1354 cut-off events. [2023-08-30 03:44:04,229 INFO L131 PetriNetUnfolder]: For 1734/1734 co-relation queries the response was YES. [2023-08-30 03:44:04,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1354 events. 648/1354 cut-off events. For 1734/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6394 event pairs, 150 based on Foata normal form. 180/1511 useless extension candidates. Maximal degree in co-relation 4414. Up to 420 conditions per place. [2023-08-30 03:44:04,238 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 154 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-30 03:44:04,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 163 transitions, 1222 flow [2023-08-30 03:44:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:44:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:44:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 766 transitions. [2023-08-30 03:44:04,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860406091370558 [2023-08-30 03:44:04,241 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 766 transitions. [2023-08-30 03:44:04,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 766 transitions. [2023-08-30 03:44:04,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:04,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 766 transitions. [2023-08-30 03:44:04,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.75) internal successors, (766), 8 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,246 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,246 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 268 flow. Second operand 8 states and 766 transitions. [2023-08-30 03:44:04,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 163 transitions, 1222 flow [2023-08-30 03:44:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1173 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 03:44:04,253 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 324 flow [2023-08-30 03:44:04,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 03:44:04,254 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-30 03:44:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 324 flow [2023-08-30 03:44:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:04,255 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 03:44:04,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:04,460 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,SelfDestructingSolverStorable10 [2023-08-30 03:44:04,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:04,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -664849330, now seen corresponding path program 2 times [2023-08-30 03:44:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46619495] [2023-08-30 03:44:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:04,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46619495] [2023-08-30 03:44:04,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46619495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:04,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022777063] [2023-08-30 03:44:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:44:04,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:04,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 03:44:05,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:44:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 03:44:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:05,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:05,152 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 03:44:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:05,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:05,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022777063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:05,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-30 03:44:05,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951663704] [2023-08-30 03:44:05,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:05,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 03:44:05,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:05,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 03:44:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 03:44:05,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-08-30 03:44:05,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:05,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:05,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-08-30 03:44:05,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:05,944 INFO L130 PetriNetUnfolder]: 625/1308 cut-off events. [2023-08-30 03:44:05,944 INFO L131 PetriNetUnfolder]: For 3074/3074 co-relation queries the response was YES. [2023-08-30 03:44:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1308 events. 625/1308 cut-off events. For 3074/3074 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5983 event pairs, 0 based on Foata normal form. 23/1308 useless extension candidates. Maximal degree in co-relation 4705. Up to 525 conditions per place. [2023-08-30 03:44:05,954 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 115 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-08-30 03:44:05,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 1034 flow [2023-08-30 03:44:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:44:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:44:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 755 transitions. [2023-08-30 03:44:05,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47906091370558374 [2023-08-30 03:44:05,957 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 755 transitions. [2023-08-30 03:44:05,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 755 transitions. [2023-08-30 03:44:05,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:05,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 755 transitions. [2023-08-30 03:44:05,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:05,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:05,962 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:05,962 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 324 flow. Second operand 8 states and 755 transitions. [2023-08-30 03:44:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 1034 flow [2023-08-30 03:44:05,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 122 transitions, 981 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 03:44:05,970 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 313 flow [2023-08-30 03:44:05,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-08-30 03:44:05,971 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-08-30 03:44:05,972 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 313 flow [2023-08-30 03:44:05,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:05,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:05,972 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 03:44:05,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:06,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:06,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:06,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1988989111, now seen corresponding path program 2 times [2023-08-30 03:44:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:06,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803392926] [2023-08-30 03:44:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803392926] [2023-08-30 03:44:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803392926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85138459] [2023-08-30 03:44:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:44:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:06,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:06,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 03:44:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:44:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 03:44:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:06,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:06,831 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 03:44:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:07,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:07,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85138459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:07,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:07,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-30 03:44:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335120507] [2023-08-30 03:44:07,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 03:44:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 03:44:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-30 03:44:07,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 03:44:07,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 313 flow. Second operand has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:07,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:07,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 03:44:07,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:07,614 INFO L130 PetriNetUnfolder]: 596/1252 cut-off events. [2023-08-30 03:44:07,614 INFO L131 PetriNetUnfolder]: For 2078/2078 co-relation queries the response was YES. [2023-08-30 03:44:07,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4422 conditions, 1252 events. 596/1252 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5764 event pairs, 0 based on Foata normal form. 29/1259 useless extension candidates. Maximal degree in co-relation 4393. Up to 309 conditions per place. [2023-08-30 03:44:07,624 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 148 selfloop transitions, 6 changer transitions 0/155 dead transitions. [2023-08-30 03:44:07,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1163 flow [2023-08-30 03:44:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:44:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:44:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 786 transitions. [2023-08-30 03:44:07,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-08-30 03:44:07,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 786 transitions. [2023-08-30 03:44:07,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 786 transitions. [2023-08-30 03:44:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:07,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 786 transitions. [2023-08-30 03:44:07,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.25) internal successors, (786), 8 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) [2023-08-30 03:44:07,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:07,653 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:07,653 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 313 flow. Second operand 8 states and 786 transitions. [2023-08-30 03:44:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1163 flow [2023-08-30 03:44:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 155 transitions, 1107 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 03:44:07,660 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 288 flow [2023-08-30 03:44:07,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2023-08-30 03:44:07,662 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-08-30 03:44:07,662 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 288 flow [2023-08-30 03:44:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:07,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:07,663 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:07,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:07,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:07,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1880032769, now seen corresponding path program 1 times [2023-08-30 03:44:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:07,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835765490] [2023-08-30 03:44:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835765490] [2023-08-30 03:44:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835765490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583813327] [2023-08-30 03:44:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:07,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:07,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 03:44:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:44:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:08,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:08,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583813327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:08,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:08,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 03:44:08,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177951398] [2023-08-30 03:44:08,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:08,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:44:08,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:44:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:44:08,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 197 [2023-08-30 03:44:08,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:08,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:08,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 197 [2023-08-30 03:44:08,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:08,661 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-08-30 03:44:08,661 INFO L131 PetriNetUnfolder]: For 4992/4992 co-relation queries the response was YES. [2023-08-30 03:44:08,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7643 conditions, 2176 events. 1058/2176 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9705 event pairs, 125 based on Foata normal form. 132/2286 useless extension candidates. Maximal degree in co-relation 7614. Up to 491 conditions per place. [2023-08-30 03:44:08,677 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 178 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2023-08-30 03:44:08,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 1570 flow [2023-08-30 03:44:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:44:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:44:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1181 transitions. [2023-08-30 03:44:08,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49957698815566837 [2023-08-30 03:44:08,682 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1181 transitions. [2023-08-30 03:44:08,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1181 transitions. [2023-08-30 03:44:08,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:08,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1181 transitions. [2023-08-30 03:44:08,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:08,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:08,689 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:08,689 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 288 flow. Second operand 12 states and 1181 transitions. [2023-08-30 03:44:08,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 1570 flow [2023-08-30 03:44:08,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 191 transitions, 1469 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 03:44:08,696 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 365 flow [2023-08-30 03:44:08,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2023-08-30 03:44:08,697 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2023-08-30 03:44:08,697 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 365 flow [2023-08-30 03:44:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:08,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:08,698 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:08,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:08,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 03:44:08,904 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:08,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1520440221, now seen corresponding path program 2 times [2023-08-30 03:44:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:08,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791891527] [2023-08-30 03:44:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-30 03:44:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791891527] [2023-08-30 03:44:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791891527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:09,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163010040] [2023-08-30 03:44:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:09,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 03:44:09,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:09,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:09,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 03:44:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:09,570 INFO L130 PetriNetUnfolder]: 1036/2107 cut-off events. [2023-08-30 03:44:09,570 INFO L131 PetriNetUnfolder]: For 5134/5134 co-relation queries the response was YES. [2023-08-30 03:44:09,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7949 conditions, 2107 events. 1036/2107 cut-off events. For 5134/5134 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 9758 event pairs, 945 based on Foata normal form. 0/2107 useless extension candidates. Maximal degree in co-relation 7914. Up to 2026 conditions per place. [2023-08-30 03:44:09,587 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 55 selfloop transitions, 4 changer transitions 2/62 dead transitions. [2023-08-30 03:44:09,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 62 transitions, 533 flow [2023-08-30 03:44:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2023-08-30 03:44:09,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720812182741117 [2023-08-30 03:44:09,589 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 372 transitions. [2023-08-30 03:44:09,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 372 transitions. [2023-08-30 03:44:09,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:09,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 372 transitions. [2023-08-30 03:44:09,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:09,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:09,592 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:09,592 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 365 flow. Second operand 4 states and 372 transitions. [2023-08-30 03:44:09,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 62 transitions, 533 flow [2023-08-30 03:44:09,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 62 transitions, 496 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-30 03:44:09,603 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 314 flow [2023-08-30 03:44:09,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-08-30 03:44:09,603 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 56 predicate places. [2023-08-30 03:44:09,604 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 314 flow [2023-08-30 03:44:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:09,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:09,604 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 03:44:09,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:09,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1358047202, now seen corresponding path program 1 times [2023-08-30 03:44:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:09,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903759374] [2023-08-30 03:44:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-30 03:44:10,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903759374] [2023-08-30 03:44:10,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903759374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:10,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541986909] [2023-08-30 03:44:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:10,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:10,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:10,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:10,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 03:44:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 03:44:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-30 03:44:10,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-30 03:44:10,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541986909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:10,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:10,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 13 [2023-08-30 03:44:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153570186] [2023-08-30 03:44:10,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 03:44:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 03:44:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:44:11,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 197 [2023-08-30 03:44:11,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:11,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 197 [2023-08-30 03:44:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:11,775 INFO L130 PetriNetUnfolder]: 989/2004 cut-off events. [2023-08-30 03:44:11,775 INFO L131 PetriNetUnfolder]: For 3924/3924 co-relation queries the response was YES. [2023-08-30 03:44:11,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 2004 events. 989/2004 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 9156 event pairs, 1 based on Foata normal form. 10/2014 useless extension candidates. Maximal degree in co-relation 7078. Up to 1735 conditions per place. [2023-08-30 03:44:11,785 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 35 selfloop transitions, 5 changer transitions 50/90 dead transitions. [2023-08-30 03:44:11,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 90 transitions, 720 flow [2023-08-30 03:44:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 03:44:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 03:44:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 748 transitions. [2023-08-30 03:44:11,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37969543147208124 [2023-08-30 03:44:11,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 748 transitions. [2023-08-30 03:44:11,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 748 transitions. [2023-08-30 03:44:11,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:11,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 748 transitions. [2023-08-30 03:44:11,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.8) internal successors, (748), 10 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,794 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,794 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 314 flow. Second operand 10 states and 748 transitions. [2023-08-30 03:44:11,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 90 transitions, 720 flow [2023-08-30 03:44:11,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 682 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 03:44:11,805 INFO L231 Difference]: Finished difference. Result has 93 places, 38 transitions, 232 flow [2023-08-30 03:44:11,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=93, PETRI_TRANSITIONS=38} [2023-08-30 03:44:11,806 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2023-08-30 03:44:11,806 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 38 transitions, 232 flow [2023-08-30 03:44:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:11,807 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:11,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:12,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 03:44:12,013 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:12,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 123714558, now seen corresponding path program 2 times [2023-08-30 03:44:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19958734] [2023-08-30 03:44:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-08-30 03:44:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:12,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19958734] [2023-08-30 03:44:12,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19958734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:12,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790496628] [2023-08-30 03:44:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:44:12,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:12,554 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:12,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 03:44:12,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:44:12,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 03:44:12,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-30 03:44:12,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790496628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2023-08-30 03:44:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116533518] [2023-08-30 03:44:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:12,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:44:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:12,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:44:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:44:13,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-30 03:44:13,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 38 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:13,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-30 03:44:13,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:13,139 INFO L130 PetriNetUnfolder]: 49/156 cut-off events. [2023-08-30 03:44:13,140 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-30 03:44:13,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 156 events. 49/156 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 141 event pairs, 46 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 511. Up to 155 conditions per place. [2023-08-30 03:44:13,141 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-30 03:44:13,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 37 transitions, 300 flow [2023-08-30 03:44:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-08-30 03:44:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276649746192893 [2023-08-30 03:44:13,143 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-08-30 03:44:13,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-08-30 03:44:13,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:13,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-08-30 03:44:13,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,147 INFO L175 Difference]: Start difference. First operand has 93 places, 38 transitions, 232 flow. Second operand 4 states and 337 transitions. [2023-08-30 03:44:13,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 37 transitions, 300 flow [2023-08-30 03:44:13,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 37 transitions, 277 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 03:44:13,151 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-30 03:44:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-30 03:44:13,152 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-08-30 03:44:13,152 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-30 03:44:13,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,154 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-08-30 03:44:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-08-30 03:44:13,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-08-30 03:44:13,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-08-30 03:44:13,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 03:44:13,358 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 03:44:13,361 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 03:44:13,362 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 03:44:13,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 03:44:13 BasicIcfg [2023-08-30 03:44:13,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 03:44:13,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 03:44:13,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 03:44:13,365 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 03:44:13,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:50" (3/4) ... [2023-08-30 03:44:13,367 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 03:44:13,372 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-30 03:44:13,375 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-30 03:44:13,375 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:13,375 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:13,410 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 03:44:13,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 03:44:13,411 INFO L158 Benchmark]: Toolchain (without parser) took 24464.21ms. Allocated memory was 77.6MB in the beginning and 312.5MB in the end (delta: 234.9MB). Free memory was 48.9MB in the beginning and 111.6MB in the end (delta: -62.8MB). Peak memory consumption was 170.2MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,411 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 03:44:13,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 599.88ms. Allocated memory is still 77.6MB. Free memory was 48.7MB in the beginning and 39.9MB in the end (delta: 8.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,412 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.88ms. Allocated memory is still 77.6MB. Free memory was 39.9MB in the beginning and 37.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,412 INFO L158 Benchmark]: Boogie Preprocessor took 38.00ms. Allocated memory is still 77.6MB. Free memory was 37.5MB in the beginning and 35.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,412 INFO L158 Benchmark]: RCFGBuilder took 441.82ms. Allocated memory is still 77.6MB. Free memory was 35.7MB in the beginning and 45.8MB in the end (delta: -10.1MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,413 INFO L158 Benchmark]: TraceAbstraction took 23271.83ms. Allocated memory was 77.6MB in the beginning and 312.5MB in the end (delta: 234.9MB). Free memory was 45.1MB in the beginning and 114.8MB in the end (delta: -69.7MB). Peak memory consumption was 164.6MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,413 INFO L158 Benchmark]: Witness Printer took 45.44ms. Allocated memory is still 312.5MB. Free memory was 114.8MB in the beginning and 111.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:13,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 599.88ms. Allocated memory is still 77.6MB. Free memory was 48.7MB in the beginning and 39.9MB in the end (delta: 8.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.88ms. Allocated memory is still 77.6MB. Free memory was 39.9MB in the beginning and 37.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.00ms. Allocated memory is still 77.6MB. Free memory was 37.5MB in the beginning and 35.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 441.82ms. Allocated memory is still 77.6MB. Free memory was 35.7MB in the beginning and 45.8MB in the end (delta: -10.1MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * TraceAbstraction took 23271.83ms. Allocated memory was 77.6MB in the beginning and 312.5MB in the end (delta: 234.9MB). Free memory was 45.1MB in the beginning and 114.8MB in the end (delta: -69.7MB). Peak memory consumption was 164.6MB. Max. memory is 16.1GB. * Witness Printer took 45.44ms. Allocated memory is still 312.5MB. Free memory was 114.8MB in the beginning and 111.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 95 PlacesBefore, 36 PlacesAfterwards, 97 TransitionsBefore, 35 TransitionsAfterwards, 2430 CoEnabledTransitionPairs, 4 FixpointIterations, 23 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 99 TotalNumberOfCompositions, 3471 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2318, independent: 2215, independent conditional: 0, independent unconditional: 2215, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1317, independent: 1289, independent conditional: 0, independent unconditional: 1289, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2318, independent: 926, independent conditional: 0, independent unconditional: 926, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 1317, unknown conditional: 0, unknown unconditional: 1317] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 120 locations, 20 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: 23.1s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3619 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2988 mSDsluCounter, 877 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 801 mSDsCounter, 175 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7074 IncrementalHoareTripleChecker+Invalid, 7249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 175 mSolverCounterUnsat, 76 mSDtfsCounter, 7074 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 532 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=14, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 687 NumberOfCodeBlocks, 633 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 804 ConstructedInterpolants, 22 QuantifiedInterpolants, 8198 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2206 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 33 InterpolantComputations, 11 PerfectInterpolantSequences, 2299/2615 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 - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 03:44:13,436 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: TRUE