./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.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_02-funloop_norace.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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --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 03:43:44,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:43:44,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:43:44,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:43:44,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:43:44,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:43:44,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:43:44,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:43:44,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:43:44,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:43:44,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:43:44,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:43:44,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:43:44,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:43:44,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:43:44,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:43:44,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:43:44,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:43:44,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:43:44,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:43:44,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:43:44,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:43:44,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:43:44,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:43:44,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:43:44,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:43:44,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:43:44,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:43:44,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:43:44,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:43:44,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:43:44,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:43:44,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:43:44,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:43:44,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:43:44,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:43:44,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:43:44,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:43:44,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:43:44,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:43:44,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:43:44,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:43:44,240 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:43:44,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:43:44,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:43:44,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:43:44,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:43:44,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:43:44,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:43:44,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:43:44,244 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:43:44,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:43:44,244 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:43:44,245 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:43:44,246 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:43:44,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:43:44,246 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:43:44,246 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:43:44,246 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:43:44,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:43:44,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:43:44,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:43:44,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:43:44,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:43:44,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:43:44,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:43:44,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:43:44,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:43:44,248 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:43:44,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:43:44,248 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:43:44,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:43:44,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:43:44,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:43:44,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:43:44,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:43:44,527 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:43:44,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-08-30 03:43:45,447 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:43:45,687 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:43:45,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-08-30 03:43:45,704 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca17c9339/868ad1372c484cc1875965ae516c9ba5/FLAG70015ddd1 [2023-08-30 03:43:45,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca17c9339/868ad1372c484cc1875965ae516c9ba5 [2023-08-30 03:43:45,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:43:45,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:43:45,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:43:45,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:43:45,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:43:45,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:45" (1/1) ... [2023-08-30 03:43:45,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626b2ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:45, skipping insertion in model container [2023-08-30 03:43:45,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:45" (1/1) ... [2023-08-30 03:43:45,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:43:45,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:43:46,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:43:46,059 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:43:46,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:43:46,183 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:43:46,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46 WrapperNode [2023-08-30 03:43:46,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:43:46,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:43:46,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:43:46,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:43:46,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,240 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-30 03:43:46,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:43:46,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:43:46,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:43:46,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:43:46,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:43:46,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:43:46,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:43:46,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:43:46,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (1/1) ... [2023-08-30 03:43:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:43:46,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:46,338 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 03:43:46,356 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 03:43:46,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:43:46,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:43:46,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:43:46,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:43:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 03:43:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:43:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 03:43:46,366 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 03:43:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:43:46,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:43:46,367 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 03:43:46,525 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:43:46,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:43:46,701 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:43:46,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:43:46,706 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 03:43:46,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:46 BoogieIcfgContainer [2023-08-30 03:43:46,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:43:46,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:43:46,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:43:46,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:43:46,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:43:45" (1/3) ... [2023-08-30 03:43:46,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eefdfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:46, skipping insertion in model container [2023-08-30 03:43:46,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:46" (2/3) ... [2023-08-30 03:43:46,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eefdfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:46, skipping insertion in model container [2023-08-30 03:43:46,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:46" (3/3) ... [2023-08-30 03:43:46,713 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-08-30 03:43:46,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:43:46,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-30 03:43:46,726 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:43:46,800 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:43:46,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 86 transitions, 177 flow [2023-08-30 03:43:46,872 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 03:43:46,873 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 154 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-30 03:43:46,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 86 transitions, 177 flow [2023-08-30 03:43:46,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 173 flow [2023-08-30 03:43:46,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:43:46,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 173 flow [2023-08-30 03:43:46,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 173 flow [2023-08-30 03:43:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 173 flow [2023-08-30 03:43:46,927 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 03:43:46,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-30 03:43:46,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 1782 [2023-08-30 03:43:48,551 INFO L134 LiptonReduction]: Checked pairs total: 2347 [2023-08-30 03:43:48,551 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-30 03:43:48,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:43:48,565 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;@3d81e75f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:43:48,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-30 03:43:48,567 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 03:43:48,567 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:48,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 03:43:48,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:48,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 10885, now seen corresponding path program 1 times [2023-08-30 03:43:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:48,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667101666] [2023-08-30 03:43:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:48,685 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 03:43:48,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:48,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667101666] [2023-08-30 03:43:48,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667101666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:48,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:48,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:43:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696920866] [2023-08-30 03:43:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:43:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:43:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:43:48,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 172 [2023-08-30 03:43:48,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:48,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 172 [2023-08-30 03:43:48,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:48,775 INFO L130 PetriNetUnfolder]: 74/155 cut-off events. [2023-08-30 03:43:48,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:48,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 155 events. 74/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 295. Up to 149 conditions per place. [2023-08-30 03:43:48,779 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-08-30 03:43:48,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2023-08-30 03:43:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:43:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:43:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-08-30 03:43:48,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2023-08-30 03:43:48,794 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-08-30 03:43:48,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-08-30 03:43:48,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:48,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-08-30 03:43:48,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 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 03:43:48,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,806 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,807 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 190 transitions. [2023-08-30 03:43:48,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2023-08-30 03:43:48,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:48,810 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2023-08-30 03:43:48,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-08-30 03:43:48,815 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-30 03:43:48,815 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2023-08-30 03:43:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:48,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 03:43:48,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:43:48,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:48,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 324474418, now seen corresponding path program 1 times [2023-08-30 03:43:48,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:48,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794060078] [2023-08-30 03:43:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:48,884 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 03:43:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:48,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794060078] [2023-08-30 03:43:48,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794060078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:48,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:43:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273613611] [2023-08-30 03:43:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:43:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:43:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:43:48,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2023-08-30 03:43:48,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:48,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2023-08-30 03:43:48,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:48,947 INFO L130 PetriNetUnfolder]: 74/156 cut-off events. [2023-08-30 03:43:48,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 307. Up to 149 conditions per place. [2023-08-30 03:43:48,949 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 03:43:48,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2023-08-30 03:43:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:43:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:43:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 03:43:48,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49806201550387597 [2023-08-30 03:43:48,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 03:43:48,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 03:43:48,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:48,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 03:43:48,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,954 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 257 transitions. [2023-08-30 03:43:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2023-08-30 03:43:48,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:43:48,955 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2023-08-30 03:43:48,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-30 03:43:48,955 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2023-08-30 03:43:48,955 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2023-08-30 03:43:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:48,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:48,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 03:43:48,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:43:48,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:48,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1461062998, now seen corresponding path program 1 times [2023-08-30 03:43:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094823844] [2023-08-30 03:43:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:49,015 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 03:43:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:49,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094823844] [2023-08-30 03:43:49,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094823844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:49,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663671800] [2023-08-30 03:43:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:49,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:49,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:49,026 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 03:43:49,061 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 03:43:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:43:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:49,115 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 03:43:49,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:49,127 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 03:43:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663671800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:49,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 03:43:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208057335] [2023-08-30 03:43:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:49,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:43:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:43:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:43:49,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-08-30 03:43:49,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:49,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-08-30 03:43:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:49,253 INFO L130 PetriNetUnfolder]: 74/159 cut-off events. [2023-08-30 03:43:49,253 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:43:49,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 159 events. 74/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 602 event pairs, 56 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 321. Up to 149 conditions per place. [2023-08-30 03:43:49,255 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-08-30 03:43:49,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2023-08-30 03:43:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:43:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:43:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2023-08-30 03:43:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748062015503876 [2023-08-30 03:43:49,257 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2023-08-30 03:43:49,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2023-08-30 03:43:49,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:49,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2023-08-30 03:43:49,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,261 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,261 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 490 transitions. [2023-08-30 03:43:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2023-08-30 03:43:49,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:49,262 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2023-08-30 03:43:49,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-30 03:43:49,263 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-08-30 03:43:49,263 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2023-08-30 03:43:49,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:49,263 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 03:43:49,271 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 03:43:49,468 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 03:43:49,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:49,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239374, now seen corresponding path program 2 times [2023-08-30 03:43:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:49,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303885238] [2023-08-30 03:43:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:49,580 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 03:43:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:49,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303885238] [2023-08-30 03:43:49,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303885238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:49,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718176700] [2023-08-30 03:43:49,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:43:49,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:49,598 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 03:43:49,601 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 03:43:49,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:43:49,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:43:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 03:43:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:49,741 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 03:43:49,778 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 03:43:49,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:43:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718176700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:49,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:43:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-30 03:43:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910084086] [2023-08-30 03:43:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:49,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 03:43:49,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-08-30 03:43:49,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:49,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-08-30 03:43:49,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:49,972 INFO L130 PetriNetUnfolder]: 119/260 cut-off events. [2023-08-30 03:43:49,972 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 03:43:49,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 260 events. 119/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1071 event pairs, 56 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 522. Up to 152 conditions per place. [2023-08-30 03:43:49,976 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-30 03:43:49,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 196 flow [2023-08-30 03:43:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:43:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:43:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-08-30 03:43:49,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956395348837209 [2023-08-30 03:43:49,979 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-08-30 03:43:49,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-08-30 03:43:49,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:49,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-08-30 03:43:49,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,985 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,985 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 4 states and 341 transitions. [2023-08-30 03:43:49,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 196 flow [2023-08-30 03:43:49,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 03:43:49,989 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 92 flow [2023-08-30 03:43:49,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-30 03:43:49,990 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-08-30 03:43:49,990 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 92 flow [2023-08-30 03:43:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:49,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:49,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 03:43:49,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 03:43:50,196 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 03:43:50,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:50,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239495, now seen corresponding path program 1 times [2023-08-30 03:43:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:50,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517143912] [2023-08-30 03:43:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:50,306 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 03:43:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:50,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517143912] [2023-08-30 03:43:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517143912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:50,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741325915] [2023-08-30 03:43:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:50,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:50,310 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 03:43:50,313 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 03:43:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:43:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:50,392 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 03:43:50,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:50,435 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 03:43:50,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741325915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:50,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:50,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 03:43:50,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181373779] [2023-08-30 03:43:50,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:50,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 03:43:50,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 03:43:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 03:43:50,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-08-30 03:43:50,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 92 flow. Second operand has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:50,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:50,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-08-30 03:43:50,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:50,547 INFO L130 PetriNetUnfolder]: 119/264 cut-off events. [2023-08-30 03:43:50,547 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 03:43:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 264 events. 119/264 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1014 event pairs, 96 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 592. Up to 239 conditions per place. [2023-08-30 03:43:50,549 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 21 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2023-08-30 03:43:50,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 192 flow [2023-08-30 03:43:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:43:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:43:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 961 transitions. [2023-08-30 03:43:50,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46560077519379844 [2023-08-30 03:43:50,554 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 961 transitions. [2023-08-30 03:43:50,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 961 transitions. [2023-08-30 03:43:50,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 961 transitions. [2023-08-30 03:43:50,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 80.08333333333333) internal successors, (961), 12 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:50,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:50,560 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:50,561 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 92 flow. Second operand 12 states and 961 transitions. [2023-08-30 03:43:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 192 flow [2023-08-30 03:43:50,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:50,563 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 172 flow [2023-08-30 03:43:50,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-30 03:43:50,564 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-08-30 03:43:50,564 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 172 flow [2023-08-30 03:43:50,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:50,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:50,565 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-30 03:43:50,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 03:43:50,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:50,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:50,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130169, now seen corresponding path program 2 times [2023-08-30 03:43:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932976268] [2023-08-30 03:43:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:50,986 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 03:43:50,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:50,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932976268] [2023-08-30 03:43:50,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932976268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:50,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:50,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:43:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511469893] [2023-08-30 03:43:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:50,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:50,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:43:51,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 172 [2023-08-30 03:43:51,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:51,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 172 [2023-08-30 03:43:51,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:51,163 INFO L130 PetriNetUnfolder]: 184/382 cut-off events. [2023-08-30 03:43:51,163 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 03:43:51,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 382 events. 184/382 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1584 event pairs, 96 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 879. Up to 248 conditions per place. [2023-08-30 03:43:51,166 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 43 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-30 03:43:51,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 302 flow [2023-08-30 03:43:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:43:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:43:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-08-30 03:43:51,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898255813953488 [2023-08-30 03:43:51,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-08-30 03:43:51,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-08-30 03:43:51,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:51,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-08-30 03:43:51,169 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 03:43:51,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,170 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 172 flow. Second operand 4 states and 337 transitions. [2023-08-30 03:43:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 302 flow [2023-08-30 03:43:51,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 254 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 03:43:51,176 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 142 flow [2023-08-30 03:43:51,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2023-08-30 03:43:51,178 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-30 03:43:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 142 flow [2023-08-30 03:43:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:51,178 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-30 03:43:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 03:43:51,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:51,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130168, now seen corresponding path program 1 times [2023-08-30 03:43:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276916678] [2023-08-30 03:43:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:51,286 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 03:43:51,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276916678] [2023-08-30 03:43:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276916678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:51,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:51,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:43:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102914344] [2023-08-30 03:43:51,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:51,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:43:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:43:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:43:51,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-30 03:43:51,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:51,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-30 03:43:51,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:51,479 INFO L130 PetriNetUnfolder]: 158/334 cut-off events. [2023-08-30 03:43:51,480 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-30 03:43:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 334 events. 158/334 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1274 event pairs, 108 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 837. Up to 274 conditions per place. [2023-08-30 03:43:51,482 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-30 03:43:51,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 250 flow [2023-08-30 03:43:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:43:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:43:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-30 03:43:51,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213178294573644 [2023-08-30 03:43:51,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-30 03:43:51,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-30 03:43:51,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:51,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-30 03:43:51,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,486 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 142 flow. Second operand 3 states and 269 transitions. [2023-08-30 03:43:51,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 250 flow [2023-08-30 03:43:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:51,489 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 142 flow [2023-08-30 03:43:51,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-30 03:43:51,489 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2023-08-30 03:43:51,490 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 142 flow [2023-08-30 03:43:51,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:51,490 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 03:43:51,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:43:51,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:51,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash 592398959, now seen corresponding path program 1 times [2023-08-30 03:43:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487967676] [2023-08-30 03:43:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:51,584 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 03:43:51,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487967676] [2023-08-30 03:43:51,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487967676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:51,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:43:51,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:43:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913084201] [2023-08-30 03:43:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:43:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:43:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:43:51,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-08-30 03:43:51,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 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 03:43:51,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:51,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-08-30 03:43:51,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:51,790 INFO L130 PetriNetUnfolder]: 136/300 cut-off events. [2023-08-30 03:43:51,790 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-30 03:43:51,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 300 events. 136/300 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1181 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 782. Up to 190 conditions per place. [2023-08-30 03:43:51,791 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 47 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2023-08-30 03:43:51,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 338 flow [2023-08-30 03:43:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 03:43:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 03:43:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-08-30 03:43:51,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2023-08-30 03:43:51,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-08-30 03:43:51,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-08-30 03:43:51,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:51,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-08-30 03:43:51,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:51,795 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 142 flow. Second operand 5 states and 415 transitions. [2023-08-30 03:43:51,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 338 flow [2023-08-30 03:43:51,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:51,796 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 212 flow [2023-08-30 03:43:51,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-30 03:43:51,798 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-08-30 03:43:51,798 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 212 flow [2023-08-30 03:43:51,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 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 03:43:51,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:51,799 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:43:51,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:43:51,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:51,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash 137532136, now seen corresponding path program 1 times [2023-08-30 03:43:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344617490] [2023-08-30 03:43:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:51,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:52,003 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 03:43:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:52,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344617490] [2023-08-30 03:43:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344617490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041559801] [2023-08-30 03:43:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:52,006 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 03:43:52,021 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 03:43:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 03:43:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:52,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:52,172 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 03:43:52,271 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 03:43:52,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:52,605 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 03:43:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041559801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:52,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 03:43:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273298841] [2023-08-30 03:43:52,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:52,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 03:43:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 03:43:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:43:53,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-08-30 03:43:53,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 212 flow. Second operand has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 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 03:43:53,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:53,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-08-30 03:43:53,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:53,377 INFO L130 PetriNetUnfolder]: 280/618 cut-off events. [2023-08-30 03:43:53,377 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-08-30 03:43:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 618 events. 280/618 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2536 event pairs, 54 based on Foata normal form. 84/679 useless extension candidates. Maximal degree in co-relation 1925. Up to 196 conditions per place. [2023-08-30 03:43:53,381 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 106 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-08-30 03:43:53,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 780 flow [2023-08-30 03:43:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:43:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:43:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 662 transitions. [2023-08-30 03:43:53,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811046511627907 [2023-08-30 03:43:53,382 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 662 transitions. [2023-08-30 03:43:53,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 662 transitions. [2023-08-30 03:43:53,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:53,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 662 transitions. [2023-08-30 03:43:53,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.75) internal successors, (662), 8 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,386 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:53,386 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 212 flow. Second operand 8 states and 662 transitions. [2023-08-30 03:43:53,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 780 flow [2023-08-30 03:43:53,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:43:53,389 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 277 flow [2023-08-30 03:43:53,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=66, PETRI_TRANSITIONS=44} [2023-08-30 03:43:53,389 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2023-08-30 03:43:53,389 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 277 flow [2023-08-30 03:43:53,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 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 03:43:53,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:53,390 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:43:53,409 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 03:43:53,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:53,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:53,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash 28456066, now seen corresponding path program 1 times [2023-08-30 03:43:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:53,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036088767] [2023-08-30 03:43:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:53,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:53,754 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 03:43:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036088767] [2023-08-30 03:43:53,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036088767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393951118] [2023-08-30 03:43:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:53,756 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 03:43:53,781 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 03:43:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 03:43:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:53,920 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 03:43:53,983 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 03:43:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:54,159 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 03:43:54,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393951118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:54,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:54,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 03:43:54,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912613465] [2023-08-30 03:43:54,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:54,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 03:43:54,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 03:43:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-30 03:43:54,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-08-30 03:43:54,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 44 transitions, 277 flow. Second operand has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:54,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-08-30 03:43:54,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:54,898 INFO L130 PetriNetUnfolder]: 556/1170 cut-off events. [2023-08-30 03:43:54,898 INFO L131 PetriNetUnfolder]: For 2461/2461 co-relation queries the response was YES. [2023-08-30 03:43:54,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1170 events. 556/1170 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5342 event pairs, 132 based on Foata normal form. 138/1285 useless extension candidates. Maximal degree in co-relation 3979. Up to 424 conditions per place. [2023-08-30 03:43:54,904 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 111 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2023-08-30 03:43:54,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 119 transitions, 999 flow [2023-08-30 03:43:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:43:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:43:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-08-30 03:43:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2023-08-30 03:43:54,906 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-08-30 03:43:54,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-08-30 03:43:54,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:54,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-08-30 03:43:54,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,909 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,910 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 277 flow. Second operand 8 states and 648 transitions. [2023-08-30 03:43:54,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 119 transitions, 999 flow [2023-08-30 03:43:54,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 948 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:54,913 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 336 flow [2023-08-30 03:43:54,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=336, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2023-08-30 03:43:54,914 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2023-08-30 03:43:54,914 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 336 flow [2023-08-30 03:43:54,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:54,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:54,915 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 03:43:54,921 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 03:43:55,119 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,SelfDestructingSolverStorable9 [2023-08-30 03:43:55,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:55,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash -495639670, now seen corresponding path program 2 times [2023-08-30 03:43:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689776311] [2023-08-30 03:43:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:55,458 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 03:43:55,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:55,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689776311] [2023-08-30 03:43:55,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689776311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:55,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067877912] [2023-08-30 03:43:55,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:43:55,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:55,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:55,461 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 03:43:55,463 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 03:43:55,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:43:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:43:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 03:43:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:55,615 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 03:43:55,808 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 03:43:55,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:43:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067877912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:43:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:43:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-30 03:43:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055068750] [2023-08-30 03:43:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:43:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 03:43:55,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 03:43:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-30 03:43:55,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-08-30 03:43:55,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:43:55,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-08-30 03:43:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:56,198 INFO L130 PetriNetUnfolder]: 530/1120 cut-off events. [2023-08-30 03:43:56,199 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2023-08-30 03:43:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 1120 events. 530/1120 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5045 event pairs, 0 based on Foata normal form. 26/1124 useless extension candidates. Maximal degree in co-relation 4159. Up to 276 conditions per place. [2023-08-30 03:43:56,206 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-30 03:43:56,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1190 flow [2023-08-30 03:43:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 03:43:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 03:43:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 688 transitions. [2023-08-30 03:43:56,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 03:43:56,209 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 688 transitions. [2023-08-30 03:43:56,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 688 transitions. [2023-08-30 03:43:56,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:56,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 688 transitions. [2023-08-30 03:43:56,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,213 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,213 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 336 flow. Second operand 8 states and 688 transitions. [2023-08-30 03:43:56,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1190 flow [2023-08-30 03:43:56,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 1141 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 03:43:56,220 INFO L231 Difference]: Finished difference. Result has 79 places, 46 transitions, 313 flow [2023-08-30 03:43:56,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=79, PETRI_TRANSITIONS=46} [2023-08-30 03:43:56,221 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2023-08-30 03:43:56,221 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 46 transitions, 313 flow [2023-08-30 03:43:56,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:56,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:43:56,222 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 03:43:56,230 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 03:43:56,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:56,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:43:56,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:43:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1803083171, now seen corresponding path program 2 times [2023-08-30 03:43:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:43:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135811576] [2023-08-30 03:43:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:43:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:43:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:43:56,773 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 03:43:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:43:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135811576] [2023-08-30 03:43:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135811576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:43:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717812880] [2023-08-30 03:43:56,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:43:56,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:43:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:43:56,781 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 03:43:56,782 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 03:43:56,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:43:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:43:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 03:43:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:43:56,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:43:56,940 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 03:43:57,111 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 03:43:57,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:43:59,414 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 03:43:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717812880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:43:59,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:43:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-30 03:43:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073272272] [2023-08-30 03:43:59,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:43:59,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 03:43:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:43:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 03:43:59,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-08-30 03:44:00,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-08-30 03:44:00,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 46 transitions, 313 flow. Second operand has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:00,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:00,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-08-30 03:44:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:01,338 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-08-30 03:44:01,338 INFO L131 PetriNetUnfolder]: For 6686/6686 co-relation queries the response was YES. [2023-08-30 03:44:01,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 2176 events. 1058/2176 cut-off events. For 6686/6686 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 9848 event pairs, 125 based on Foata normal form. 264/2418 useless extension candidates. Maximal degree in co-relation 7812. Up to 491 conditions per place. [2023-08-30 03:44:01,350 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 188 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2023-08-30 03:44:01,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 202 transitions, 1707 flow [2023-08-30 03:44:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 03:44:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 03:44:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1137 transitions. [2023-08-30 03:44:01,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47217607973421927 [2023-08-30 03:44:01,353 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1137 transitions. [2023-08-30 03:44:01,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1137 transitions. [2023-08-30 03:44:01,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:01,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1137 transitions. [2023-08-30 03:44:01,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:01,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:01,358 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:01,358 INFO L175 Difference]: Start difference. First operand has 79 places, 46 transitions, 313 flow. Second operand 14 states and 1137 transitions. [2023-08-30 03:44:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 202 transitions, 1707 flow [2023-08-30 03:44:01,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 202 transitions, 1597 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 03:44:01,366 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 438 flow [2023-08-30 03:44:01,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-08-30 03:44:01,367 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2023-08-30 03:44:01,367 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 438 flow [2023-08-30 03:44:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:01,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:01,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-30 03:44:01,374 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 03:44:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:01,573 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:44:01,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash 65465491, now seen corresponding path program 3 times [2023-08-30 03:44:01,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569312032] [2023-08-30 03:44:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:01,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569312032] [2023-08-30 03:44:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569312032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940955917] [2023-08-30 03:44:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 03:44:01,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:01,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:01,791 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 03:44:01,793 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 03:44:01,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 03:44:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 03:44:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:02,001 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 03:44:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-30 03:44:02,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940955917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-08-30 03:44:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203309489] [2023-08-30 03:44:02,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:44:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:44:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 03:44:02,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-08-30 03:44:02,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:02,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:02,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-08-30 03:44:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:02,630 INFO L130 PetriNetUnfolder]: 1036/2132 cut-off events. [2023-08-30 03:44:02,631 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2023-08-30 03:44:02,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8113 conditions, 2132 events. 1036/2132 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 9683 event pairs, 21 based on Foata normal form. 22/2132 useless extension candidates. Maximal degree in co-relation 8078. Up to 1910 conditions per place. [2023-08-30 03:44:02,646 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 81 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 03:44:02,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 803 flow [2023-08-30 03:44:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:44:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:44:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 473 transitions. [2023-08-30 03:44:02,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 03:44:02,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 473 transitions. [2023-08-30 03:44:02,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 473 transitions. [2023-08-30 03:44:02,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:02,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 473 transitions. [2023-08-30 03:44:02,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 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 03:44:02,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:02,651 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:02,651 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 438 flow. Second operand 6 states and 473 transitions. [2023-08-30 03:44:02,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 803 flow [2023-08-30 03:44:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 763 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-08-30 03:44:02,661 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 390 flow [2023-08-30 03:44:02,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-30 03:44:02,662 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2023-08-30 03:44:02,662 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 390 flow [2023-08-30 03:44:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:02,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:02,663 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-30 03:44:02,668 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 03:44:02,868 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,SelfDestructingSolverStorable12 [2023-08-30 03:44:02,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:44:02,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash 65465486, now seen corresponding path program 1 times [2023-08-30 03:44:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582004290] [2023-08-30 03:44:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:03,136 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 03:44:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:03,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582004290] [2023-08-30 03:44:03,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582004290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:03,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925763940] [2023-08-30 03:44:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:03,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-08-30 03:44:03,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:03,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-08-30 03:44:03,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:03,548 INFO L130 PetriNetUnfolder]: 1014/2063 cut-off events. [2023-08-30 03:44:03,548 INFO L131 PetriNetUnfolder]: For 4639/4639 co-relation queries the response was YES. [2023-08-30 03:44:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2063 events. 1014/2063 cut-off events. For 4639/4639 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9408 event pairs, 924 based on Foata normal form. 0/2063 useless extension candidates. Maximal degree in co-relation 7477. Up to 1982 conditions per place. [2023-08-30 03:44:03,560 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 52 selfloop transitions, 4 changer transitions 2/59 dead transitions. [2023-08-30 03:44:03,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 512 flow [2023-08-30 03:44:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2023-08-30 03:44:03,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2023-08-30 03:44:03,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2023-08-30 03:44:03,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2023-08-30 03:44:03,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:03,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2023-08-30 03:44:03,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,564 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 390 flow. Second operand 4 states and 320 transitions. [2023-08-30 03:44:03,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 512 flow [2023-08-30 03:44:03,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 03:44:03,572 INFO L231 Difference]: Finished difference. Result has 89 places, 49 transitions, 331 flow [2023-08-30 03:44:03,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=89, PETRI_TRANSITIONS=49} [2023-08-30 03:44:03,573 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2023-08-30 03:44:03,573 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 49 transitions, 331 flow [2023-08-30 03:44:03,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:03,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:03,573 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 03:44:03,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-30 03:44:03,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1803452644, now seen corresponding path program 1 times [2023-08-30 03:44:03,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:03,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713427604] [2023-08-30 03:44:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:03,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:03,741 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 03:44:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:03,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713427604] [2023-08-30 03:44:03,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713427604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:03,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448612478] [2023-08-30 03:44:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:03,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:03,758 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 03:44:03,759 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 03:44:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 03:44:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:04,000 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 03:44:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:04,045 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 03:44:04,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448612478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:04,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 03:44:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219699539] [2023-08-30 03:44:04,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 03:44:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 03:44:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 03:44:04,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2023-08-30 03:44:04,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 49 transitions, 331 flow. Second operand has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:04,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2023-08-30 03:44:04,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:04,500 INFO L130 PetriNetUnfolder]: 968/1960 cut-off events. [2023-08-30 03:44:04,500 INFO L131 PetriNetUnfolder]: For 4279/4279 co-relation queries the response was YES. [2023-08-30 03:44:04,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7049 conditions, 1960 events. 968/1960 cut-off events. For 4279/4279 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9067 event pairs, 44 based on Foata normal form. 10/1970 useless extension candidates. Maximal degree in co-relation 7013. Up to 1665 conditions per place. [2023-08-30 03:44:04,511 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2023-08-30 03:44:04,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 769 flow [2023-08-30 03:44:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 03:44:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 03:44:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 513 transitions. [2023-08-30 03:44:04,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260797342192691 [2023-08-30 03:44:04,513 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 513 transitions. [2023-08-30 03:44:04,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 513 transitions. [2023-08-30 03:44:04,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:04,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 513 transitions. [2023-08-30 03:44:04,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,531 INFO L175 Difference]: Start difference. First operand has 89 places, 49 transitions, 331 flow. Second operand 7 states and 513 transitions. [2023-08-30 03:44:04,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 769 flow [2023-08-30 03:44:04,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 736 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 03:44:04,540 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-30 03:44:04,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-30 03:44:04,540 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-08-30 03:44:04,541 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-30 03:44:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:04,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-30 03:44:04,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-08-30 03:44:04,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-30 03:44:04,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-30 03:44:04,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-30 03:44:04,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-30 03:44:04,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-30 03:44:04,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-08-30 03:44:04,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-08-30 03:44:04,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-08-30 03:44:04,583 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 03:44:04,766 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,SelfDestructingSolverStorable14 [2023-08-30 03:44:04,766 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:04,769 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 03:44:04,769 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 03:44:04,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 03:44:04 BasicIcfg [2023-08-30 03:44:04,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 03:44:04,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 03:44:04,771 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 03:44:04,771 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 03:44:04,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:46" (3/4) ... [2023-08-30 03:44:04,773 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 03:44:04,777 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-30 03:44:04,782 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-30 03:44:04,782 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:04,782 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:04,818 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 03:44:04,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 03:44:04,819 INFO L158 Benchmark]: Toolchain (without parser) took 19100.59ms. Allocated memory was 71.3MB in the beginning and 285.2MB in the end (delta: 213.9MB). Free memory was 47.3MB in the beginning and 157.3MB in the end (delta: -110.0MB). Peak memory consumption was 105.5MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,819 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 50.3MB. Free memory is still 28.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 03:44:04,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.06ms. Allocated memory was 71.3MB in the beginning and 92.3MB in the end (delta: 21.0MB). Free memory was 47.3MB in the beginning and 58.9MB in the end (delta: -11.6MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,819 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.55ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 56.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,820 INFO L158 Benchmark]: Boogie Preprocessor took 42.83ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 54.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,820 INFO L158 Benchmark]: RCFGBuilder took 422.83ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 69.1MB in the end (delta: -14.2MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,820 INFO L158 Benchmark]: TraceAbstraction took 18062.26ms. Allocated memory was 92.3MB in the beginning and 285.2MB in the end (delta: 192.9MB). Free memory was 68.7MB in the beginning and 159.9MB in the end (delta: -91.3MB). Peak memory consumption was 102.2MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,821 INFO L158 Benchmark]: Witness Printer took 47.20ms. Allocated memory is still 285.2MB. Free memory was 159.9MB in the beginning and 157.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:04,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 50.3MB. Free memory is still 28.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.06ms. Allocated memory was 71.3MB in the beginning and 92.3MB in the end (delta: 21.0MB). Free memory was 47.3MB in the beginning and 58.9MB in the end (delta: -11.6MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.55ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 56.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.83ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 54.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.83ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 69.1MB in the end (delta: -14.2MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * TraceAbstraction took 18062.26ms. Allocated memory was 92.3MB in the beginning and 285.2MB in the end (delta: 192.9MB). Free memory was 68.7MB in the beginning and 159.9MB in the end (delta: -91.3MB). Peak memory consumption was 102.2MB. Max. memory is 16.1GB. * Witness Printer took 47.20ms. Allocated memory is still 285.2MB. Free memory was 159.9MB in the beginning and 157.3MB in the end (delta: 2.6MB). 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: 1.7s, 83 PlacesBefore, 28 PlacesAfterwards, 85 TransitionsBefore, 27 TransitionsAfterwards, 1782 CoEnabledTransitionPairs, 4 FixpointIterations, 19 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 86 TotalNumberOfCompositions, 2347 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1609, independent: 1539, independent conditional: 0, independent unconditional: 1539, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 978, independent: 947, independent conditional: 0, independent unconditional: 947, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1609, independent: 592, independent conditional: 0, independent unconditional: 592, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 978, unknown conditional: 0, unknown unconditional: 978] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, 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: 932]: 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 - 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, 108 locations, 16 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: 17.9s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3211 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2693 mSDsluCounter, 1422 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1344 mSDsCounter, 142 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7625 IncrementalHoareTripleChecker+Invalid, 7767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 142 mSolverCounterUnsat, 78 mSDtfsCounter, 7625 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=12, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 582 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 694 ConstructedInterpolants, 33 QuantifiedInterpolants, 7409 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2211/2439 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 03:44:04,857 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