./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.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_07-tricky_address2.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 c18dd13658bb5739ed2db8c4c80ae330682b7c3cebd2ad85657518c27ca325b9 --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 03:44:05,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:44:05,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:44:05,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:44:05,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:44:05,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:44:05,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:44:05,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:44:05,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:44:05,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:44:05,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:44:05,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:44:05,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:44:05,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:44:05,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:44:05,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:44:05,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:44:05,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:44:05,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:44:05,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:44:05,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:44:05,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:44:05,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:44:05,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:44:05,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:44:05,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:44:05,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:44:05,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:44:05,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:44:05,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:44:05,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:44:05,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:44:05,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:44:05,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:44:05,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:44:05,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:44:05,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:44:05,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:44:05,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:44:05,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:44:05,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:44:05,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:44:05,679 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:44:05,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:44:05,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:44:05,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:44:05,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:44:05,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:44:05,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:44:05,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:44:05,682 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:44:05,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:44:05,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:44:05,683 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:44:05,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:44:05,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:44:05,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:44:05,684 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:44:05,684 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:44:05,684 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:44:05,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:44:05,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:44:05,685 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:44:05,685 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:44:05,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:44:05,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:44:05,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:44:05,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:44:05,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:44:05,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:44:05,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:44:05,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:44:05,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:44:05,687 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:44:05,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:44:05,687 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:44:05,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18dd13658bb5739ed2db8c4c80ae330682b7c3cebd2ad85657518c27ca325b9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:44:05,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:44:06,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:44:06,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:44:06,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:44:06,020 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:44:06,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.i [2023-08-30 03:44:07,319 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:44:07,620 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:44:07,621 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.i [2023-08-30 03:44:07,639 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06da70cca/6e202103ce8d4234b8978c4f9e75ae88/FLAG48f4dbb0c [2023-08-30 03:44:07,659 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06da70cca/6e202103ce8d4234b8978c4f9e75ae88 [2023-08-30 03:44:07,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:44:07,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:44:07,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:44:07,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:44:07,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:44:07,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:44:07" (1/1) ... [2023-08-30 03:44:07,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cbcb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:07, skipping insertion in model container [2023-08-30 03:44:07,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:44:07" (1/1) ... [2023-08-30 03:44:07,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:44:07,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:44:08,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:44:08,184 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:44:08,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:44:08,267 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:44:08,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08 WrapperNode [2023-08-30 03:44:08,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:44:08,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:44:08,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:44:08,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:44:08,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,307 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-08-30 03:44:08,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:44:08,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:44:08,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:44:08,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:44:08,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:44:08,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:44:08,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:44:08,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:44:08,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (1/1) ... [2023-08-30 03:44:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:44:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:08,402 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 03:44:08,428 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 03:44:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:44:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:44:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:44:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:44:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 03:44:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:44:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 03:44:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 03:44:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:44:08,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:44:08,443 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 03:44:08,561 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:44:08,563 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:44:08,816 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:44:08,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:44:08,822 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 03:44:08,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:08 BoogieIcfgContainer [2023-08-30 03:44:08,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:44:08,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:44:08,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:44:08,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:44:08,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:44:07" (1/3) ... [2023-08-30 03:44:08,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387ca54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:44:08, skipping insertion in model container [2023-08-30 03:44:08,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:08" (2/3) ... [2023-08-30 03:44:08,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387ca54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:44:08, skipping insertion in model container [2023-08-30 03:44:08,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:08" (3/3) ... [2023-08-30 03:44:08,844 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_07-tricky_address2.i [2023-08-30 03:44:08,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:44:08,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-30 03:44:08,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:44:08,952 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:44:08,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 173 flow [2023-08-30 03:44:09,040 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 03:44:09,041 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-30 03:44:09,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 84 transitions, 173 flow [2023-08-30 03:44:09,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 83 transitions, 169 flow [2023-08-30 03:44:09,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:44:09,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-30 03:44:09,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-30 03:44:09,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 83 transitions, 169 flow [2023-08-30 03:44:09,107 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 03:44:09,108 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:09,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-30 03:44:09,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 1144 [2023-08-30 03:44:11,208 INFO L134 LiptonReduction]: Checked pairs total: 2039 [2023-08-30 03:44:11,208 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-30 03:44:11,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:44:11,225 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;@2c92bc3d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:44:11,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-30 03:44:11,227 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 03:44:11,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:11,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:11,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 03:44:11,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:11,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 10123, now seen corresponding path program 1 times [2023-08-30 03:44:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905371508] [2023-08-30 03:44:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:11,353 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 03:44:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905371508] [2023-08-30 03:44:11,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905371508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:11,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:11,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:44:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597922865] [2023-08-30 03:44:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:44:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:44:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:44:11,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-30 03:44:11,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 51 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:11,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-30 03:44:11,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:11,436 INFO L130 PetriNetUnfolder]: 41/99 cut-off events. [2023-08-30 03:44:11,436 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:11,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 99 events. 41/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 374 event pairs, 40 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 188. Up to 98 conditions per place. [2023-08-30 03:44:11,438 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 17 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-30 03:44:11,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 75 flow [2023-08-30 03:44:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:44:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:44:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 182 transitions. [2023-08-30 03:44:11,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-08-30 03:44:11,450 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 182 transitions. [2023-08-30 03:44:11,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 182 transitions. [2023-08-30 03:44:11,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:11,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 182 transitions. [2023-08-30 03:44:11,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,459 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,461 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 51 flow. Second operand 2 states and 182 transitions. [2023-08-30 03:44:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 75 flow [2023-08-30 03:44:11,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:11,464 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 40 flow [2023-08-30 03:44:11,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-08-30 03:44:11,468 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-30 03:44:11,469 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 40 flow [2023-08-30 03:44:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:11,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:44:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:44:11,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:11,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 9734106, now seen corresponding path program 1 times [2023-08-30 03:44:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600477885] [2023-08-30 03:44:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:11,601 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 03:44:11,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:11,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600477885] [2023-08-30 03:44:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600477885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:11,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:11,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185740794] [2023-08-30 03:44:11,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:11,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:44:11,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:44:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:44:11,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-08-30 03:44:11,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:11,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-08-30 03:44:11,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:11,672 INFO L130 PetriNetUnfolder]: 41/100 cut-off events. [2023-08-30 03:44:11,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:11,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 100 events. 41/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 370 event pairs, 40 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 200. Up to 98 conditions per place. [2023-08-30 03:44:11,674 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-30 03:44:11,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 78 flow [2023-08-30 03:44:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:44:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:44:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-30 03:44:11,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-30 03:44:11,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-30 03:44:11,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-30 03:44:11,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:11,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-30 03:44:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,684 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 40 flow. Second operand 3 states and 247 transitions. [2023-08-30 03:44:11,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 78 flow [2023-08-30 03:44:11,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:44:11,685 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 52 flow [2023-08-30 03:44:11,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-30 03:44:11,686 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2023-08-30 03:44:11,686 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 52 flow [2023-08-30 03:44:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:11,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 03:44:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:44:11,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:11,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 301090086, now seen corresponding path program 1 times [2023-08-30 03:44:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891125787] [2023-08-30 03:44:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:11,765 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 03:44:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891125787] [2023-08-30 03:44:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891125787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110189485] [2023-08-30 03:44:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:11,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:11,769 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 03:44:11,791 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 03:44:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:44:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:11,889 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 03:44:11,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:11,923 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 03:44:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110189485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:11,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 03:44:11,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158711839] [2023-08-30 03:44:11,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:44:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:44:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:44:11,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-08-30 03:44:11,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:11,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:11,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-08-30 03:44:11,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:12,022 INFO L130 PetriNetUnfolder]: 41/103 cut-off events. [2023-08-30 03:44:12,022 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:12,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 103 events. 41/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 371 event pairs, 40 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 214. Up to 98 conditions per place. [2023-08-30 03:44:12,023 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2023-08-30 03:44:12,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 106 flow [2023-08-30 03:44:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:44:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:44:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-08-30 03:44:12,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46745562130177515 [2023-08-30 03:44:12,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-08-30 03:44:12,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-08-30 03:44:12,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:12,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-08-30 03:44:12,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:12,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 03:44:12,030 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 03:44:12,030 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 6 states and 474 transitions. [2023-08-30 03:44:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 106 flow [2023-08-30 03:44:12,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:12,031 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 84 flow [2023-08-30 03:44:12,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 03:44:12,032 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-30 03:44:12,032 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 84 flow [2023-08-30 03:44:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 03:44:12,040 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 03:44:12,238 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 03:44:12,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:12,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508378, now seen corresponding path program 2 times [2023-08-30 03:44:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:12,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868304835] [2023-08-30 03:44:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:12,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:12,366 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 03:44:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868304835] [2023-08-30 03:44:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868304835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873116788] [2023-08-30 03:44:12,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:44:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:12,369 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 03:44:12,384 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 03:44:12,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:44:12,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 03:44:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:12,540 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 03:44:12,562 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 03:44:12,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:12,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873116788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:12,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:12,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 03:44:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340519267] [2023-08-30 03:44:12,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:12,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 03:44:12,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-30 03:44:12,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 03:44:12,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:12,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-30 03:44:12,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:12,676 INFO L130 PetriNetUnfolder]: 33/86 cut-off events. [2023-08-30 03:44:12,677 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 03:44:12,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 86 events. 33/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 290 event pairs, 32 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 190. Up to 84 conditions per place. [2023-08-30 03:44:12,677 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-30 03:44:12,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 122 flow [2023-08-30 03:44:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:44:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:44:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-30 03:44:12,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49506903353057197 [2023-08-30 03:44:12,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-30 03:44:12,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-30 03:44:12,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:12,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-30 03:44:12,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 03:44:12,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:12,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:12,682 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 84 flow. Second operand 3 states and 251 transitions. [2023-08-30 03:44:12,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 122 flow [2023-08-30 03:44:12,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 108 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:12,684 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 70 flow [2023-08-30 03:44:12,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-30 03:44:12,685 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-30 03:44:12,685 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 70 flow [2023-08-30 03:44:12,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 03:44:12,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 03:44:12,691 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 03:44:12,891 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 03:44:12,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:12,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508367, now seen corresponding path program 1 times [2023-08-30 03:44:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112548237] [2023-08-30 03:44:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:12,978 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 03:44:12,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112548237] [2023-08-30 03:44:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112548237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681293135] [2023-08-30 03:44:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:12,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:12,980 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 03:44:12,983 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 03:44:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:44:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:13,056 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 03:44:13,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:13,107 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 03:44:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681293135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:13,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 03:44:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118439241] [2023-08-30 03:44:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:44:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:44:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:44:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-08-30 03:44:13,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 70 flow. Second operand has 13 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:13,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-08-30 03:44:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:13,191 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-08-30 03:44:13,191 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 03:44:13,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 92 events. 33/92 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 290 event pairs, 32 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 208. Up to 81 conditions per place. [2023-08-30 03:44:13,192 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 11 changer transitions 0/28 dead transitions. [2023-08-30 03:44:13,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 158 flow [2023-08-30 03:44:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:44:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:44:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2023-08-30 03:44:13,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2023-08-30 03:44:13,207 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2023-08-30 03:44:13,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2023-08-30 03:44:13,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:13,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2023-08-30 03:44:13,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.66666666666667) internal successors, (932), 12 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,214 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,214 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 70 flow. Second operand 12 states and 932 transitions. [2023-08-30 03:44:13,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 158 flow [2023-08-30 03:44:13,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 28 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:13,216 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 153 flow [2023-08-30 03:44:13,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=153, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2023-08-30 03:44:13,217 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2023-08-30 03:44:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 153 flow [2023-08-30 03:44:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:13,218 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 03:44:13,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 03:44:13,418 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 03:44:13,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:13,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332273, now seen corresponding path program 2 times [2023-08-30 03:44:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352060850] [2023-08-30 03:44:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:13,518 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 03:44:13,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:13,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352060850] [2023-08-30 03:44:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352060850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:13,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085523560] [2023-08-30 03:44:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:13,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2023-08-30 03:44:13,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:13,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2023-08-30 03:44:13,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:13,620 INFO L130 PetriNetUnfolder]: 27/89 cut-off events. [2023-08-30 03:44:13,620 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 03:44:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 89 events. 27/89 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 224 event pairs, 20 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 228. Up to 63 conditions per place. [2023-08-30 03:44:13,622 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 03:44:13,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 33 transitions, 229 flow [2023-08-30 03:44:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-08-30 03:44:13,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541420118343195 [2023-08-30 03:44:13,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-08-30 03:44:13,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-08-30 03:44:13,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:13,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-08-30 03:44:13,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,627 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 153 flow. Second operand 4 states and 307 transitions. [2023-08-30 03:44:13,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 33 transitions, 229 flow [2023-08-30 03:44:13,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 181 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 03:44:13,633 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 137 flow [2023-08-30 03:44:13,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-08-30 03:44:13,636 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2023-08-30 03:44:13,636 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 137 flow [2023-08-30 03:44:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:13,636 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 03:44:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 03:44:13,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:13,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332272, now seen corresponding path program 1 times [2023-08-30 03:44:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696590601] [2023-08-30 03:44:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:13,870 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 03:44:13,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696590601] [2023-08-30 03:44:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696590601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:13,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703420489] [2023-08-30 03:44:13,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:13,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-30 03:44:13,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:13,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:13,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-30 03:44:13,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:13,996 INFO L130 PetriNetUnfolder]: 19/72 cut-off events. [2023-08-30 03:44:13,996 INFO L131 PetriNetUnfolder]: For 60/63 co-relation queries the response was YES. [2023-08-30 03:44:13,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 72 events. 19/72 cut-off events. For 60/63 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 182 event pairs, 16 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 209. Up to 55 conditions per place. [2023-08-30 03:44:13,997 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 23 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-30 03:44:13,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 28 transitions, 185 flow [2023-08-30 03:44:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-30 03:44:14,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44822485207100593 [2023-08-30 03:44:14,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-30 03:44:14,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-30 03:44:14,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:14,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-30 03:44:14,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 03:44:14,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,003 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 137 flow. Second operand 4 states and 303 transitions. [2023-08-30 03:44:14,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 28 transitions, 185 flow [2023-08-30 03:44:14,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 28 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:14,005 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 136 flow [2023-08-30 03:44:14,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-30 03:44:14,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-30 03:44:14,006 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 136 flow [2023-08-30 03:44:14,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 03:44:14,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:14,007 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:14,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:44:14,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:14,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash 409945830, now seen corresponding path program 1 times [2023-08-30 03:44:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:14,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480462084] [2023-08-30 03:44:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:14,111 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 03:44:14,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:14,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480462084] [2023-08-30 03:44:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480462084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:14,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873628529] [2023-08-30 03:44:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:14,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:14,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-30 03:44:14,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 03:44:14,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:14,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-30 03:44:14,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:14,178 INFO L130 PetriNetUnfolder]: 16/59 cut-off events. [2023-08-30 03:44:14,178 INFO L131 PetriNetUnfolder]: For 62/65 co-relation queries the response was YES. [2023-08-30 03:44:14,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 59 events. 16/59 cut-off events. For 62/65 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 12 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 168. Up to 33 conditions per place. [2023-08-30 03:44:14,179 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 19 selfloop transitions, 3 changer transitions 6/30 dead transitions. [2023-08-30 03:44:14,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 30 transitions, 193 flow [2023-08-30 03:44:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2023-08-30 03:44:14,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2023-08-30 03:44:14,181 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 305 transitions. [2023-08-30 03:44:14,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 305 transitions. [2023-08-30 03:44:14,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:14,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 305 transitions. [2023-08-30 03:44:14,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 03:44:14,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,184 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,184 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 136 flow. Second operand 4 states and 305 transitions. [2023-08-30 03:44:14,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 30 transitions, 193 flow [2023-08-30 03:44:14,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 30 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:44:14,187 INFO L231 Difference]: Finished difference. Result has 49 places, 23 transitions, 116 flow [2023-08-30 03:44:14,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=23} [2023-08-30 03:44:14,190 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-30 03:44:14,191 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 23 transitions, 116 flow [2023-08-30 03:44:14,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 03:44:14,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:14,191 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:44:14,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 03:44:14,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1132120041, now seen corresponding path program 1 times [2023-08-30 03:44:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66165084] [2023-08-30 03:44:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:14,295 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 03:44:14,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:14,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66165084] [2023-08-30 03:44:14,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66165084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:14,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:44:14,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423213333] [2023-08-30 03:44:14,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:14,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:44:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:14,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:44:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:44:14,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 169 [2023-08-30 03:44:14,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 23 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 03:44:14,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:14,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 169 [2023-08-30 03:44:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:14,388 INFO L130 PetriNetUnfolder]: 10/40 cut-off events. [2023-08-30 03:44:14,388 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 03:44:14,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 40 events. 10/40 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 9 based on Foata normal form. 2/42 useless extension candidates. Maximal degree in co-relation 124. Up to 28 conditions per place. [2023-08-30 03:44:14,389 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-30 03:44:14,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 21 transitions, 148 flow [2023-08-30 03:44:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-30 03:44:14,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2023-08-30 03:44:14,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-30 03:44:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-30 03:44:14,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:14,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-30 03:44:14,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:44:14,393 INFO L175 Difference]: Start difference. First operand has 49 places, 23 transitions, 116 flow. Second operand 4 states and 273 transitions. [2023-08-30 03:44:14,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 21 transitions, 148 flow [2023-08-30 03:44:14,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 21 transitions, 138 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 03:44:14,395 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-30 03:44:14,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-30 03:44:14,396 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-08-30 03:44:14,396 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-30 03:44:14,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 03:44:14,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-30 03:44:14,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-30 03:44:14,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-30 03:44:14,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-30 03:44:14,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-30 03:44:14,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-30 03:44:14,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-30 03:44:14,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-30 03:44:14,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-08-30 03:44:14,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-08-30 03:44:14,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-08-30 03:44:14,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 03:44:14,401 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2023-08-30 03:44:14,405 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 03:44:14,405 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 03:44:14,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 03:44:14 BasicIcfg [2023-08-30 03:44:14,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 03:44:14,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 03:44:14,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 03:44:14,409 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 03:44:14,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:08" (3/4) ... [2023-08-30 03:44:14,411 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 03:44:14,416 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-30 03:44:14,418 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-30 03:44:14,419 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:14,419 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:14,445 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 03:44:14,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 03:44:14,446 INFO L158 Benchmark]: Toolchain (without parser) took 6783.51ms. Allocated memory was 65.0MB in the beginning and 136.3MB in the end (delta: 71.3MB). Free memory was 41.0MB in the beginning and 52.8MB in the end (delta: -11.8MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,446 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory was 42.5MB in the beginning and 42.5MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 03:44:14,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 603.57ms. Allocated memory was 65.0MB in the beginning and 94.4MB in the end (delta: 29.4MB). Free memory was 40.7MB in the beginning and 58.0MB in the end (delta: -17.3MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.40ms. Allocated memory is still 94.4MB. Free memory was 57.7MB in the beginning and 55.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,447 INFO L158 Benchmark]: Boogie Preprocessor took 48.57ms. Allocated memory is still 94.4MB. Free memory was 55.6MB in the beginning and 53.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,447 INFO L158 Benchmark]: RCFGBuilder took 458.84ms. Allocated memory is still 94.4MB. Free memory was 53.8MB in the beginning and 70.8MB in the end (delta: -17.0MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,447 INFO L158 Benchmark]: TraceAbstraction took 5582.61ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 70.1MB in the beginning and 55.9MB in the end (delta: 14.2MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,448 INFO L158 Benchmark]: Witness Printer took 36.70ms. Allocated memory is still 136.3MB. Free memory was 55.9MB in the beginning and 52.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:14,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory was 42.5MB in the beginning and 42.5MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 603.57ms. Allocated memory was 65.0MB in the beginning and 94.4MB in the end (delta: 29.4MB). Free memory was 40.7MB in the beginning and 58.0MB in the end (delta: -17.3MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.40ms. Allocated memory is still 94.4MB. Free memory was 57.7MB in the beginning and 55.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.57ms. Allocated memory is still 94.4MB. Free memory was 55.6MB in the beginning and 53.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 458.84ms. Allocated memory is still 94.4MB. Free memory was 53.8MB in the beginning and 70.8MB in the end (delta: -17.0MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5582.61ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 70.1MB in the beginning and 55.9MB in the end (delta: 14.2MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. * Witness Printer took 36.70ms. Allocated memory is still 136.3MB. Free memory was 55.9MB in the beginning and 52.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 83 PlacesBefore, 27 PlacesAfterwards, 83 TransitionsBefore, 24 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 2 ConcurrentYvCompositions, 3 ChoiceCompositions, 85 TotalNumberOfCompositions, 2039 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1237, independent: 1127, independent conditional: 0, independent unconditional: 1127, dependent: 110, dependent conditional: 0, dependent unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 684, independent: 662, independent conditional: 0, independent unconditional: 662, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1237, independent: 465, independent conditional: 0, independent unconditional: 465, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 684, unknown conditional: 0, unknown unconditional: 684] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 935]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 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: 5.4s, OverallIterations: 9, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 544 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 316 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 791 IncrementalHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 18 mSDtfsCounter, 791 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=5, InterpolantAutomatonStates: 42, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 114 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 785 SizeOfPredicates, 2 NumberOfNonLiveVariables, 250 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 230/273 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 03:44:14,465 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