./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 997512b29ff7fdf1190aebf9d039045a1841d533 ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:47:27,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:47:27,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:47:27,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:47:27,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:47:27,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:47:27,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:47:27,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:47:27,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:47:27,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:47:27,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:47:27,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:47:27,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:47:27,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:47:27,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:47:27,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:47:27,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:47:27,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:47:27,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:47:27,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:47:27,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:47:27,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:47:27,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:47:27,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:47:27,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:47:27,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:47:27,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:47:27,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:47:27,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:47:27,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:47:27,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:47:27,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:47:27,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:47:27,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:47:27,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:47:27,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:47:27,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:47:27,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:47:27,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:47:27,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:47:27,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:47:27,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:47:27,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:47:27,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:47:27,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:47:27,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:47:27,421 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:47:27,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:47:27,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:47:27,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:47:27,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:47:27,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:47:27,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:47:27,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:47:27,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:47:27,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:47:27,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:47:27,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:47:27,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:47:27,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:47:27,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:47:27,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:47:27,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:47:27,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:47:27,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:47:27,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:47:27,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:47:27,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:47:27,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:47:27,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:47:27,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:47:27,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 ! call(reach_error())) ) 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 -> 997512b29ff7fdf1190aebf9d039045a1841d533 [2020-10-20 00:47:27,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:47:27,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:47:27,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:47:27,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:47:27,743 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:47:27,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-10-20 00:47:27,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d5bc2f/5327427fbef04c7783822276f6857865/FLAG6cb4a3475 [2020-10-20 00:47:28,376 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:47:28,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-10-20 00:47:28,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d5bc2f/5327427fbef04c7783822276f6857865/FLAG6cb4a3475 [2020-10-20 00:47:28,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3d5bc2f/5327427fbef04c7783822276f6857865 [2020-10-20 00:47:28,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:47:28,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:47:28,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:47:28,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:47:28,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:47:28,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:47:28" (1/1) ... [2020-10-20 00:47:28,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c2896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:28, skipping insertion in model container [2020-10-20 00:47:28,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:47:28" (1/1) ... [2020-10-20 00:47:28,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:47:28,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:47:29,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:47:29,097 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:47:29,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:47:29,213 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:47:29,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29 WrapperNode [2020-10-20 00:47:29,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:47:29,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:47:29,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:47:29,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:47:29,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:47:29,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:47:29,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:47:29,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:47:29,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... [2020-10-20 00:47:29,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:47:29,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:47:29,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:47:29,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:47:29,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:47:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:47:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:47:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:47:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:47:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:47:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:47:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:47:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:47:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:47:29,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:47:30,002 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:47:30,003 INFO L298 CfgBuilder]: Removed 22 assume(true) statements. [2020-10-20 00:47:30,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:47:30 BoogieIcfgContainer [2020-10-20 00:47:30,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:47:30,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:47:30,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:47:30,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:47:30,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:47:28" (1/3) ... [2020-10-20 00:47:30,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bef1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:47:30, skipping insertion in model container [2020-10-20 00:47:30,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:47:29" (2/3) ... [2020-10-20 00:47:30,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bef1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:47:30, skipping insertion in model container [2020-10-20 00:47:30,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:47:30" (3/3) ... [2020-10-20 00:47:30,015 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-10-20 00:47:30,027 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:47:30,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:47:30,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:47:30,077 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:47:30,077 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:47:30,077 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:47:30,078 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:47:30,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:47:30,078 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:47:30,078 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:47:30,078 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:47:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-20 00:47:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:47:30,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:47:30,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:47:30,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:47:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:47:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash 220216549, now seen corresponding path program 1 times [2020-10-20 00:47:30,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:47:30,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815503748] [2020-10-20 00:47:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:47:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:47:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:47:30,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815503748] [2020-10-20 00:47:30,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:47:30,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:47:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370387968] [2020-10-20 00:47:30,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:47:30,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:47:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:47:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:47:30,292 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-10-20 00:47:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:47:30,317 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2020-10-20 00:47:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:47:30,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-20 00:47:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:47:30,335 INFO L225 Difference]: With dead ends: 69 [2020-10-20 00:47:30,335 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:47:30,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:47:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:47:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 00:47:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:47:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:47:30,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-20 00:47:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:47:30,381 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:47:30,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:47:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:47:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:47:30,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:47:30,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:47:30,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:47:30,382 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:47:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:47:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1936219756, now seen corresponding path program 1 times [2020-10-20 00:47:30,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:47:30,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190212913] [2020-10-20 00:47:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:47:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:47:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:47:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190212913] [2020-10-20 00:47:30,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:47:30,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:47:30,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029922924] [2020-10-20 00:47:30,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:47:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:47:30,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:47:30,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:47:30,521 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-20 00:47:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:47:30,618 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-20 00:47:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:47:30,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-20 00:47:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:47:30,620 INFO L225 Difference]: With dead ends: 35 [2020-10-20 00:47:30,620 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:47:30,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:47:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:47:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2020-10-20 00:47:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:47:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-20 00:47:30,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-10-20 00:47:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:47:30,627 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-20 00:47:30,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:47:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-20 00:47:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:47:30,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:47:30,629 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:47:30,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:47:30,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:47:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:47:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1496568487, now seen corresponding path program 1 times [2020-10-20 00:47:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:47:30,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285550508] [2020-10-20 00:47:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:47:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:47:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:47:30,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285550508] [2020-10-20 00:47:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530615560] [2020-10-20 00:47:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:47:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:47:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 00:47:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:47:30,945 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-20 00:47:30,946 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:47:30,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:47:30,960 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-20 00:47:30,960 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:47:30,987 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:47:30,988 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:47:30,988 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-10-20 00:47:31,022 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-20 00:47:31,023 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:47:31,030 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:47:31,033 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-20 00:47:31,034 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:47:31,039 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:47:31,039 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:47:31,040 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-10-20 00:47:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:47:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:47:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-20 00:47:31,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739417759] [2020-10-20 00:47:31,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:47:31,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:47:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:47:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:47:31,044 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-20 00:47:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:47:31,121 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-20 00:47:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:47:31,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-20 00:47:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:47:31,123 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:47:31,123 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:47:31,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:47:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:47:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2020-10-20 00:47:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 00:47:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 00:47:31,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-20 00:47:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:47:31,128 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 00:47:31,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:47:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 00:47:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:47:31,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:47:31,129 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:47:31,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:47:31,340 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:47:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:47:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2013732869, now seen corresponding path program 1 times [2020-10-20 00:47:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:47:31,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975015566] [2020-10-20 00:47:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:47:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:47:31,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:47:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:47:31,394 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:47:31,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:47:31,417 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:47:31,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:47:31,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:47:31 BoogieIcfgContainer [2020-10-20 00:47:31,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:47:31,452 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:47:31,452 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:47:31,452 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:47:31,453 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:47:30" (3/4) ... [2020-10-20 00:47:31,455 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:47:31,523 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:47:31,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:47:31,525 INFO L168 Benchmark]: Toolchain (without parser) took 2865.72 ms. Allocated memory was 38.8 MB in the beginning and 58.2 MB in the end (delta: 19.4 MB). Free memory was 15.4 MB in the beginning and 34.2 MB in the end (delta: -18.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,526 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 38.8 MB. Free memory is still 20.2 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:47:31,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 548.89 ms. Allocated memory was 38.8 MB in the beginning and 48.8 MB in the end (delta: 10.0 MB). Free memory was 14.6 MB in the beginning and 15.3 MB in the end (delta: -759.2 kB). Peak memory consumption was 15.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,527 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.59 ms. Allocated memory was 48.8 MB in the beginning and 49.8 MB in the end (delta: 1.0 MB). Free memory was 15.3 MB in the beginning and 29.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,528 INFO L168 Benchmark]: Boogie Preprocessor took 51.47 ms. Allocated memory is still 49.8 MB. Free memory was 29.4 MB in the beginning and 27.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,529 INFO L168 Benchmark]: RCFGBuilder took 651.30 ms. Allocated memory was 49.8 MB in the beginning and 51.4 MB in the end (delta: 1.6 MB). Free memory was 27.0 MB in the beginning and 11.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,529 INFO L168 Benchmark]: TraceAbstraction took 1444.67 ms. Allocated memory was 51.4 MB in the beginning and 58.2 MB in the end (delta: 6.8 MB). Free memory was 11.4 MB in the beginning and 9.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,530 INFO L168 Benchmark]: Witness Printer took 71.74 ms. Allocated memory is still 58.2 MB. Free memory was 9.9 MB in the beginning and 34.2 MB in the end (delta: -24.3 MB). Peak memory consumption was 216.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:47:31,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 38.8 MB. Free memory is still 20.2 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 548.89 ms. Allocated memory was 38.8 MB in the beginning and 48.8 MB in the end (delta: 10.0 MB). Free memory was 14.6 MB in the beginning and 15.3 MB in the end (delta: -759.2 kB). Peak memory consumption was 15.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 87.59 ms. Allocated memory was 48.8 MB in the beginning and 49.8 MB in the end (delta: 1.0 MB). Free memory was 15.3 MB in the beginning and 29.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 51.47 ms. Allocated memory is still 49.8 MB. Free memory was 29.4 MB in the beginning and 27.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 651.30 ms. Allocated memory was 49.8 MB in the beginning and 51.4 MB in the end (delta: 1.6 MB). Free memory was 27.0 MB in the beginning and 11.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1444.67 ms. Allocated memory was 51.4 MB in the beginning and 58.2 MB in the end (delta: 6.8 MB). Free memory was 11.4 MB in the beginning and 9.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Witness Printer took 71.74 ms. Allocated memory is still 58.2 MB. Free memory was 9.9 MB in the beginning and 34.2 MB in the end (delta: -24.3 MB). Peak memory consumption was 216.7 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 0) [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND TRUE p->h != 2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "simple_and_skiplist_2lvl-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 47 SDslu, 62 SDs, 0 SdLazy, 59 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 3699 SizeOfPredicates, 7 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...