./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/alias_of_return.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/ldv-regression/alias_of_return.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3925884d137f07b09b1c6b8320dffe7629fc0b49 ................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 23:52:49,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:52:49,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:52:49,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:52:49,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:52:49,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:52:49,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:52:49,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:52:49,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:52:49,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:52:49,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:52:49,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:52:49,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:52:49,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:52:49,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:52:49,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:52:49,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:52:49,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:52:49,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:52:49,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:52:49,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:52:49,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:52:49,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:52:49,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:52:49,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:52:49,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:52:49,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:52:49,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:52:49,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:52:49,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:52:49,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:52:49,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:52:49,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:52:49,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:52:49,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:52:49,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:52:49,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:52:49,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:52:49,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:52:49,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:52:49,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:52:49,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:52:49,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:52:49,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:52:49,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:52:49,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:52:49,526 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:52:49,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:52:49,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:52:49,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:52:49,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:52:49,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:52:49,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:52:49,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:52:49,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:52:49,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:52:49,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:52:49,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:52:49,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:52:49,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:52:49,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:52:49,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:52:49,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:52:49,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:52:49,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:52:49,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:52:49,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:52:49,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:52:49,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:52:49,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:52:49,533 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(__VERIFIER_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 -> 3925884d137f07b09b1c6b8320dffe7629fc0b49 [2019-11-27 23:52:49,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:52:49,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:52:49,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:52:49,842 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:52:49,842 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:52:49,843 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-11-27 23:52:49,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c6ea5e3/73f0d4545b5f474193b3a81bf50d2a06/FLAGfe2a0cc69 [2019-11-27 23:52:50,321 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:52:50,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-11-27 23:52:50,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c6ea5e3/73f0d4545b5f474193b3a81bf50d2a06/FLAGfe2a0cc69 [2019-11-27 23:52:50,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c6ea5e3/73f0d4545b5f474193b3a81bf50d2a06 [2019-11-27 23:52:50,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:52:50,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:52:50,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:52:50,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:52:50,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:52:50,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:50,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc5c18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50, skipping insertion in model container [2019-11-27 23:52:50,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:50,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:52:50,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:52:50,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:52:50,920 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:52:50,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:52:50,946 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:52:50,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50 WrapperNode [2019-11-27 23:52:50,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:52:50,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:52:50,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:52:50,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:52:50,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:52:51,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:52:51,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:52:51,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:52:51,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (1/1) ... [2019-11-27 23:52:51,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:52:51,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:52:51,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:52:51,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:52:51,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (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 [2019-11-27 23:52:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:52:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:52:51,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:52:51,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:52:51,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 23:52:51,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:52:51,298 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:52:51,298 INFO L297 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 23:52:51,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:51 BoogieIcfgContainer [2019-11-27 23:52:51,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:52:51,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:52:51,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:52:51,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:52:51,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:52:50" (1/3) ... [2019-11-27 23:52:51,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3677f398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:52:51, skipping insertion in model container [2019-11-27 23:52:51,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:50" (2/3) ... [2019-11-27 23:52:51,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3677f398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:52:51, skipping insertion in model container [2019-11-27 23:52:51,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:51" (3/3) ... [2019-11-27 23:52:51,305 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2019-11-27 23:52:51,313 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:52:51,319 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:52:51,331 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:52:51,356 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:52:51,357 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:52:51,357 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:52:51,357 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:52:51,357 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:52:51,357 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:52:51,358 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:52:51,358 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:52:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-27 23:52:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-27 23:52:51,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:51,376 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-27 23:52:51,376 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 28692803, now seen corresponding path program 1 times [2019-11-27 23:52:51,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:51,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516181459] [2019-11-27 23:52:51,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:51,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516181459] [2019-11-27 23:52:51,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:51,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:52:51,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431237834] [2019-11-27 23:52:51,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:52:51,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:52:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:52:51,689 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-27 23:52:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:51,761 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2019-11-27 23:52:51,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:52:51,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-27 23:52:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:51,772 INFO L225 Difference]: With dead ends: 14 [2019-11-27 23:52:51,772 INFO L226 Difference]: Without dead ends: 0 [2019-11-27 23:52:51,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:52:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-27 23:52:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-27 23:52:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-27 23:52:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-27 23:52:51,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-11-27 23:52:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:51,804 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-27 23:52:51,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:52:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-27 23:52:51,805 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-27 23:52:51,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-27 23:52:51,824 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-27 23:52:51,824 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-27 23:52:51,824 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-27 23:52:51,825 INFO L246 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2019-11-27 23:52:51,825 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-27 23:52:51,825 INFO L246 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-11-27 23:52:51,825 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-11-27 23:52:51,825 INFO L246 CegarLoopResult]: For program point L16(lines 16 30) no Hoare annotation was computed. [2019-11-27 23:52:51,826 INFO L242 CegarLoopResult]: At program point L13(lines 11 14) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#a~0.offset| |ULTIMATE.start_return_self_#res.offset|) (= |ULTIMATE.start_return_self_#res.base| |ULTIMATE.start_main_~#a~0.base|)) [2019-11-27 23:52:51,826 INFO L246 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-27 23:52:51,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:52:51 BoogieIcfgContainer [2019-11-27 23:52:51,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:52:51,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:52:51,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:52:51,845 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:52:51,845 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:51" (3/4) ... [2019-11-27 23:52:51,850 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-27 23:52:51,865 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-27 23:52:51,866 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-27 23:52:51,866 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-27 23:52:51,919 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: a == \result && \result == a [2019-11-27 23:52:51,944 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:52:51,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:52:51,950 INFO L168 Benchmark]: Toolchain (without parser) took 1225.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -138.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,950 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:52:51,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.94 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -206.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,953 INFO L168 Benchmark]: Boogie Preprocessor took 17.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:52:51,954 INFO L168 Benchmark]: RCFGBuilder took 242.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,954 INFO L168 Benchmark]: TraceAbstraction took 543.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,955 INFO L168 Benchmark]: Witness Printer took 100.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:51,963 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 224.94 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 91.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -206.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 242.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 543.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 11.5 GB. * Witness Printer took 100.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == \result && \result == a - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 7 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 7 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...