./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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 ../sv-benchmarks/c/memsafety/960521-1-3.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 c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:43:03,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:43:03,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:43:03,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:43:03,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:43:03,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:43:03,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:43:03,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:43:03,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:43:03,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:43:03,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:43:03,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:43:03,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:43:03,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:43:03,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:43:03,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:43:03,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:43:03,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:43:03,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:43:03,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:43:03,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:43:03,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:43:03,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:43:03,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:43:03,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:43:03,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:43:03,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:43:03,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:43:03,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:43:03,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:43:03,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:43:03,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:43:03,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:43:03,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:43:03,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:43:03,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:43:03,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:43:03,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:43:03,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:43:03,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:43:03,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:43:03,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 01:43:03,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:43:03,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:43:03,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:43:03,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:43:03,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:43:03,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:43:03,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:43:03,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:43:03,416 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:43:03,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:43:03,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:43:03,417 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 01:43:03,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:43:03,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:43:03,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 01:43:03,419 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:43:03,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:43:03,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:43:03,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:43:03,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:43:03,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:43:03,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:43:03,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:43:03,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:43:03,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:43:03,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:43:03,420 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:43:03,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:43:03,421 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:43:03,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2023-02-14 01:43:03,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:43:03,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:43:03,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:43:03,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:43:03,693 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:43:03,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-14 01:43:04,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:43:05,053 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:43:05,054 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-14 01:43:05,076 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a357a27/31ce6978d7704463a89e129f5157dbab/FLAGd76088bf2 [2023-02-14 01:43:05,097 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a357a27/31ce6978d7704463a89e129f5157dbab [2023-02-14 01:43:05,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:43:05,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:43:05,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:43:05,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:43:05,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:43:05,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622506e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05, skipping insertion in model container [2023-02-14 01:43:05,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:43:05,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:43:05,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:43:05,382 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:43:05,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:43:05,458 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:43:05,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05 WrapperNode [2023-02-14 01:43:05,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:43:05,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:43:05,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:43:05,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:43:05,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,509 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-14 01:43:05,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:43:05,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:43:05,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:43:05,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:43:05,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:43:05,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:43:05,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:43:05,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:43:05,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (1/1) ... [2023-02-14 01:43:05,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:43:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:05,607 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) [2023-02-14 01:43:05,628 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 [2023-02-14 01:43:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 01:43:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 01:43:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 01:43:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:43:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 01:43:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:43:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:43:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:43:05,731 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:43:05,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:43:05,939 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:43:05,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:43:05,967 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 01:43:05,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:43:05 BoogieIcfgContainer [2023-02-14 01:43:05,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:43:05,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:43:05,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:43:05,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:43:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:43:05" (1/3) ... [2023-02-14 01:43:05,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b634fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:43:05, skipping insertion in model container [2023-02-14 01:43:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:43:05" (2/3) ... [2023-02-14 01:43:05,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b634fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:43:05, skipping insertion in model container [2023-02-14 01:43:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:43:05" (3/3) ... [2023-02-14 01:43:05,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2023-02-14 01:43:06,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:43:06,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-02-14 01:43:06,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:43:06,066 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;@3302ed84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:43:06,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-02-14 01:43:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-14 01:43:06,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:06,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-14 01:43:06,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-14 01:43:06,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:06,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888034009] [2023-02-14 01:43:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:06,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888034009] [2023-02-14 01:43:06,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888034009] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:06,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:06,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:43:06,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878228691] [2023-02-14 01:43:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:43:06,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:43:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:43:06,367 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:06,418 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-14 01:43:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:43:06,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-14 01:43:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:06,427 INFO L225 Difference]: With dead ends: 50 [2023-02-14 01:43:06,427 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 01:43:06,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:43:06,431 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:06,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 01:43:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-14 01:43:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-14 01:43:06,458 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2023-02-14 01:43:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:06,458 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-14 01:43:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-14 01:43:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-14 01:43:06,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:06,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-14 01:43:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:43:06,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-14 01:43:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018871975] [2023-02-14 01:43:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:06,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018871975] [2023-02-14 01:43:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018871975] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:06,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:06,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:43:06,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143855304] [2023-02-14 01:43:06,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:06,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:43:06,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:06,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:43:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:43:06,568 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:06,583 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-02-14 01:43:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:43:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-14 01:43:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:06,585 INFO L225 Difference]: With dead ends: 47 [2023-02-14 01:43:06,586 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 01:43:06,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:43:06,587 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:06,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 01:43:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-14 01:43:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-02-14 01:43:06,596 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2023-02-14 01:43:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:06,597 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-02-14 01:43:06,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-02-14 01:43:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 01:43:06,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:06,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 01:43:06,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 01:43:06,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2023-02-14 01:43:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189400451] [2023-02-14 01:43:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:06,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189400451] [2023-02-14 01:43:06,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189400451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:06,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:06,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:43:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137447406] [2023-02-14 01:43:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:43:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:43:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:43:06,711 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:06,770 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-14 01:43:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:43:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-14 01:43:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:06,771 INFO L225 Difference]: With dead ends: 44 [2023-02-14 01:43:06,772 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 01:43:06,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:43:06,773 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:06,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:43:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 01:43:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-14 01:43:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-14 01:43:06,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2023-02-14 01:43:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:06,781 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-14 01:43:06,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-14 01:43:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 01:43:06,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:06,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 01:43:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 01:43:06,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2023-02-14 01:43:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250405727] [2023-02-14 01:43:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250405727] [2023-02-14 01:43:07,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250405727] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:07,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:07,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:43:07,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440660253] [2023-02-14 01:43:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:43:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:43:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:43:07,065 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:07,157 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-02-14 01:43:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:43:07,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-14 01:43:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:07,159 INFO L225 Difference]: With dead ends: 51 [2023-02-14 01:43:07,159 INFO L226 Difference]: Without dead ends: 51 [2023-02-14 01:43:07,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:43:07,166 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:07,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 64 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:43:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-14 01:43:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-02-14 01:43:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-02-14 01:43:07,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 6 [2023-02-14 01:43:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:07,176 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-02-14 01:43:07,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-02-14 01:43:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 01:43:07,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:07,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:07,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 01:43:07,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 59362067, now seen corresponding path program 1 times [2023-02-14 01:43:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:07,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755176929] [2023-02-14 01:43:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:07,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755176929] [2023-02-14 01:43:07,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755176929] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:07,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:07,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:43:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545577943] [2023-02-14 01:43:07,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:07,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:43:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:43:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:43:07,230 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:07,257 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-14 01:43:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:43:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 01:43:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:07,259 INFO L225 Difference]: With dead ends: 50 [2023-02-14 01:43:07,259 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 01:43:07,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:43:07,262 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:07,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 01:43:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-02-14 01:43:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-14 01:43:07,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2023-02-14 01:43:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:07,266 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-14 01:43:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-14 01:43:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:43:07,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:07,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 01:43:07,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2023-02-14 01:43:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847339585] [2023-02-14 01:43:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:07,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847339585] [2023-02-14 01:43:07,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847339585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3271032] [2023-02-14 01:43:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:07,552 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) [2023-02-14 01:43:07,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:43:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 01:43:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:07,644 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 01:43:07,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:43:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:07,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3271032] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:07,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:07,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-02-14 01:43:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194638577] [2023-02-14 01:43:07,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 01:43:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 01:43:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:43:07,766 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:07,984 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-02-14 01:43:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:43:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 01:43:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:07,986 INFO L225 Difference]: With dead ends: 67 [2023-02-14 01:43:07,986 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 01:43:07,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-14 01:43:07,987 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:07,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 120 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:43:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 01:43:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-14 01:43:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.5) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-14 01:43:07,991 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 9 [2023-02-14 01:43:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:07,991 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-14 01:43:07,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-14 01:43:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 01:43:07,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:07,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:07,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 01:43:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-14 01:43:08,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2023-02-14 01:43:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:08,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791176411] [2023-02-14 01:43:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:43:08,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791176411] [2023-02-14 01:43:08,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791176411] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:08,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:43:08,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:43:08,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255975120] [2023-02-14 01:43:08,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:08,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:43:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:43:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:43:08,237 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:08,263 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-14 01:43:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:43:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 01:43:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:08,264 INFO L225 Difference]: With dead ends: 58 [2023-02-14 01:43:08,264 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 01:43:08,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:43:08,265 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:08,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 01:43:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-14 01:43:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-02-14 01:43:08,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2023-02-14 01:43:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-02-14 01:43:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-02-14 01:43:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 01:43:08,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:08,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 01:43:08,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2023-02-14 01:43:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:08,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356763415] [2023-02-14 01:43:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356763415] [2023-02-14 01:43:08,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356763415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583122770] [2023-02-14 01:43:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:08,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:08,302 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) [2023-02-14 01:43:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:43:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 01:43:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:08,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:08,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583122770] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:08,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:08,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-14 01:43:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25993187] [2023-02-14 01:43:08,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 01:43:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 01:43:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:43:08,411 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:08,461 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-02-14 01:43:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:43:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 01:43:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:08,462 INFO L225 Difference]: With dead ends: 60 [2023-02-14 01:43:08,462 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 01:43:08,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:43:08,463 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 147 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 142 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 01:43:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-02-14 01:43:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-02-14 01:43:08,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2023-02-14 01:43:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:08,466 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-02-14 01:43:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-02-14 01:43:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 01:43:08,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:08,467 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-02-14 01:43:08,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:08,672 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,SelfDestructingSolverStorable7 [2023-02-14 01:43:08,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2023-02-14 01:43:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:08,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178322027] [2023-02-14 01:43:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:08,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178322027] [2023-02-14 01:43:08,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178322027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:08,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906772866] [2023-02-14 01:43:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:43:08,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:08,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:08,975 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) [2023-02-14 01:43:08,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:43:09,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:43:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 01:43:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:09,051 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 01:43:09,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:43:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:09,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906772866] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:09,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:09,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-02-14 01:43:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22237216] [2023-02-14 01:43:09,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:09,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 01:43:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 01:43:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-02-14 01:43:09,414 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:10,069 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2023-02-14 01:43:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 01:43:10,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-14 01:43:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:10,070 INFO L225 Difference]: With dead ends: 108 [2023-02-14 01:43:10,070 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 01:43:10,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 01:43:10,071 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:10,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 142 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:43:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 01:43:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2023-02-14 01:43:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 93 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2023-02-14 01:43:10,075 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 18 [2023-02-14 01:43:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:10,075 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2023-02-14 01:43:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2023-02-14 01:43:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 01:43:10,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:10,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:10,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:10,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 2 times [2023-02-14 01:43:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543723935] [2023-02-14 01:43:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543723935] [2023-02-14 01:43:10,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543723935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730388303] [2023-02-14 01:43:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:43:10,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:10,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:10,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:43:10,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-14 01:43:10,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:10,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 01:43:10,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:10,399 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:43:10,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:43:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 01:43:10,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:43:10,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730388303] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:43:10,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:43:10,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-02-14 01:43:10,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858285366] [2023-02-14 01:43:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:43:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:43:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:43:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:43:10,454 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:10,472 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-14 01:43:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:43:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-14 01:43:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:10,473 INFO L225 Difference]: With dead ends: 70 [2023-02-14 01:43:10,473 INFO L226 Difference]: Without dead ends: 70 [2023-02-14 01:43:10,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:43:10,474 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:43:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-14 01:43:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-02-14 01:43:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-02-14 01:43:10,476 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 20 [2023-02-14 01:43:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:10,477 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-02-14 01:43:10,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-02-14 01:43:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 01:43:10,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:10,478 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:10,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:10,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1417752011, now seen corresponding path program 1 times [2023-02-14 01:43:10,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:10,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473116200] [2023-02-14 01:43:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:10,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:10,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473116200] [2023-02-14 01:43:10,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473116200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047997738] [2023-02-14 01:43:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:10,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:10,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:43:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:10,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 01:43:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:10,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047997738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:10,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:10,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-02-14 01:43:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476621141] [2023-02-14 01:43:10,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 01:43:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 01:43:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-02-14 01:43:10,927 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:11,043 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2023-02-14 01:43:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:43:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-14 01:43:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:11,045 INFO L225 Difference]: With dead ends: 77 [2023-02-14 01:43:11,045 INFO L226 Difference]: Without dead ends: 77 [2023-02-14 01:43:11,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-02-14 01:43:11,046 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 131 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:11,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 18 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:43:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-14 01:43:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2023-02-14 01:43:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-02-14 01:43:11,052 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 23 [2023-02-14 01:43:11,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:11,052 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-02-14 01:43:11,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:11,052 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-02-14 01:43:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 01:43:11,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:11,053 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1] [2023-02-14 01:43:11,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 01:43:11,262 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 820795113, now seen corresponding path program 3 times [2023-02-14 01:43:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473044916] [2023-02-14 01:43:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:11,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:43:12,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:12,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473044916] [2023-02-14 01:43:12,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473044916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:12,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378030865] [2023-02-14 01:43:12,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:43:12,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:12,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:43:12,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 01:43:12,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 01:43:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:12,100 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-14 01:43:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:43:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-14 01:43:12,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-14 01:43:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378030865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:12,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:12,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 23 [2023-02-14 01:43:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578883056] [2023-02-14 01:43:12,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:12,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 01:43:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 01:43:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-02-14 01:43:12,542 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:13,337 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2023-02-14 01:43:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 01:43:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 01:43:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:13,339 INFO L225 Difference]: With dead ends: 96 [2023-02-14 01:43:13,339 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 01:43:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 01:43:13,339 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 248 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:13,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 20 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 01:43:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 01:43:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2023-02-14 01:43:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 79 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2023-02-14 01:43:13,341 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 36 [2023-02-14 01:43:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:13,341 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2023-02-14 01:43:13,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2023-02-14 01:43:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 01:43:13,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:13,342 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:13,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:13,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:13,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1425185077, now seen corresponding path program 2 times [2023-02-14 01:43:13,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802338668] [2023-02-14 01:43:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:13,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:13,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802338668] [2023-02-14 01:43:13,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802338668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:13,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051776833] [2023-02-14 01:43:13,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:43:13,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:13,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:13,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:13,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:43:13,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:43:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 01:43:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:14,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:14,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051776833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:14,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:14,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-02-14 01:43:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356818295] [2023-02-14 01:43:14,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 01:43:14,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 01:43:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 01:43:14,420 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:14,905 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2023-02-14 01:43:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 01:43:14,905 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-14 01:43:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:14,907 INFO L225 Difference]: With dead ends: 223 [2023-02-14 01:43:14,907 INFO L226 Difference]: Without dead ends: 223 [2023-02-14 01:43:14,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 01:43:14,910 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 620 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:14,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 49 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:43:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-14 01:43:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 128. [2023-02-14 01:43:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.1111111111111112) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2023-02-14 01:43:14,917 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 47 [2023-02-14 01:43:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:14,918 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2023-02-14 01:43:14,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2023-02-14 01:43:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-14 01:43:14,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:14,924 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:14,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 01:43:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:15,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1050815861, now seen corresponding path program 3 times [2023-02-14 01:43:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:15,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985564478] [2023-02-14 01:43:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:43:15,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985564478] [2023-02-14 01:43:15,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985564478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495344879] [2023-02-14 01:43:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:43:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:15,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:15,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 01:43:15,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 01:43:15,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 01:43:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:15,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:43:15,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:43:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-02-14 01:43:16,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-02-14 01:43:17,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495344879] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:17,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:17,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 42 [2023-02-14 01:43:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227310948] [2023-02-14 01:43:17,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:17,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-14 01:43:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-14 01:43:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 01:43:17,636 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:25,541 INFO L93 Difference]: Finished difference Result 242 states and 243 transitions. [2023-02-14 01:43:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-14 01:43:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-02-14 01:43:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:25,547 INFO L225 Difference]: With dead ends: 242 [2023-02-14 01:43:25,547 INFO L226 Difference]: Without dead ends: 242 [2023-02-14 01:43:25,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6942 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6127, Invalid=15925, Unknown=0, NotChecked=0, Total=22052 [2023-02-14 01:43:25,554 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1070 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:25,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 26 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 01:43:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-02-14 01:43:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 131. [2023-02-14 01:43:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 130 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2023-02-14 01:43:25,560 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 89 [2023-02-14 01:43:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:25,561 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2023-02-14 01:43:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2023-02-14 01:43:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-14 01:43:25,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:25,564 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:25,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:25,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 01:43:25,772 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash -140440454, now seen corresponding path program 4 times [2023-02-14 01:43:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:25,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152698186] [2023-02-14 01:43:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 01:43:26,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152698186] [2023-02-14 01:43:26,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152698186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519361530] [2023-02-14 01:43:26,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:43:26,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:26,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:26,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:26,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 01:43:27,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:43:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:43:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 01:43:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:43:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 01:43:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:43:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 01:43:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519361530] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:43:29,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:43:29,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 88 [2023-02-14 01:43:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596912964] [2023-02-14 01:43:29,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:43:29,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-14 01:43:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:43:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-14 01:43:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3367, Invalid=4289, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 01:43:29,514 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:43:31,150 INFO L93 Difference]: Finished difference Result 475 states and 476 transitions. [2023-02-14 01:43:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-14 01:43:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-02-14 01:43:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:43:31,153 INFO L225 Difference]: With dead ends: 475 [2023-02-14 01:43:31,153 INFO L226 Difference]: Without dead ends: 475 [2023-02-14 01:43:31,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5075, Invalid=8265, Unknown=0, NotChecked=0, Total=13340 [2023-02-14 01:43:31,161 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1504 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:43:31,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 89 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 01:43:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-14 01:43:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 263. [2023-02-14 01:43:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.0996168582375478) internal successors, (287), 262 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 287 transitions. [2023-02-14 01:43:31,167 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 287 transitions. Word has length 101 [2023-02-14 01:43:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:43:31,167 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 287 transitions. [2023-02-14 01:43:31,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:43:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 287 transitions. [2023-02-14 01:43:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-14 01:43:31,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:43:31,169 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:43:31,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 01:43:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 01:43:31,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-14 01:43:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:43:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash 702337748, now seen corresponding path program 5 times [2023-02-14 01:43:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:43:31,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557800812] [2023-02-14 01:43:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:43:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:43:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:43:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4702 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 01:43:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:43:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557800812] [2023-02-14 01:43:33,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557800812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:43:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388178194] [2023-02-14 01:43:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:43:33,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:43:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:43:33,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:43:33,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process