./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condnf.c --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/array-fpi/condnf.c -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 f3b39298cedfd910357326131ebb504a4d33fa54 ....................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-30f4e4a [2019-11-27 22:29:05,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:29:05,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:29:05,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:29:05,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:29:05,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:29:05,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:29:05,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:29:05,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:29:05,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:29:05,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:29:05,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:29:05,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:29:05,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:29:05,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:29:05,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:29:05,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:29:05,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:29:05,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:29:05,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:29:05,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:29:05,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:29:05,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:29:05,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:29:05,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:29:05,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:29:05,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:29:05,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:29:05,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:29:05,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:29:05,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:29:05,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:29:05,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:29:05,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:29:05,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:29:05,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:29:05,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:29:05,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:29:05,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:29:05,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:29:05,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:29:05,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:29:05,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:29:05,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:29:05,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:29:05,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:29:05,413 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:29:05,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:29:05,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:29:05,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:29:05,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:29:05,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:29:05,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:29:05,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:29:05,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:29:05,416 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:29:05,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:29:05,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:29:05,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:29:05,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:29:05,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:29:05,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:29:05,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:29:05,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:29:05,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:29:05,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:29:05,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:29:05,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:29:05,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:29:05,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:29:05,420 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 -> f3b39298cedfd910357326131ebb504a4d33fa54 [2019-11-27 22:29:05,743 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:29:05,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:29:05,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:29:05,768 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:29:05,768 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:29:05,770 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condnf.c [2019-11-27 22:29:05,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4634be021/f19125929608474d91d64f6ff8ec113d/FLAG18f0082bf [2019-11-27 22:29:06,322 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:29:06,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condnf.c [2019-11-27 22:29:06,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4634be021/f19125929608474d91d64f6ff8ec113d/FLAG18f0082bf [2019-11-27 22:29:06,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4634be021/f19125929608474d91d64f6ff8ec113d [2019-11-27 22:29:06,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:29:06,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:29:06,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:29:06,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:29:06,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:29:06,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:06,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc4abe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06, skipping insertion in model container [2019-11-27 22:29:06,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:06,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:29:06,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:29:06,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:29:06,950 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:29:06,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:29:06,987 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:29:06,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06 WrapperNode [2019-11-27 22:29:06,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:29:06,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:29:06,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:29:06,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:29:06,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:29:07,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:29:07,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:29:07,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:29:07,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (1/1) ... [2019-11-27 22:29:07,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:29:07,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:29:07,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:29:07,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:29:07,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (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 22:29:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:29:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 22:29:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:29:07,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:29:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:29:07,415 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:29:07,416 INFO L297 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-27 22:29:07,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:07 BoogieIcfgContainer [2019-11-27 22:29:07,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:29:07,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:29:07,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:29:07,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:29:07,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:29:06" (1/3) ... [2019-11-27 22:29:07,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297e0117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:29:07, skipping insertion in model container [2019-11-27 22:29:07,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:06" (2/3) ... [2019-11-27 22:29:07,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297e0117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:29:07, skipping insertion in model container [2019-11-27 22:29:07,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:07" (3/3) ... [2019-11-27 22:29:07,426 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2019-11-27 22:29:07,437 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:29:07,454 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:29:07,489 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:29:07,520 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:29:07,521 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:29:07,521 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:29:07,521 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:29:07,521 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:29:07,522 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:29:07,522 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:29:07,522 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:29:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-27 22:29:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 22:29:07,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:07,549 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:07,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1481876406, now seen corresponding path program 1 times [2019-11-27 22:29:07,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:07,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967098444] [2019-11-27 22:29:07,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:07,688 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 22:29:07,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967098444] [2019-11-27 22:29:07,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:07,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:29:07,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796870439] [2019-11-27 22:29:07,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:29:07,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:29:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:29:07,716 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-27 22:29:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:07,739 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2019-11-27 22:29:07,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:29:07,741 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-27 22:29:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:07,756 INFO L225 Difference]: With dead ends: 35 [2019-11-27 22:29:07,757 INFO L226 Difference]: Without dead ends: 16 [2019-11-27 22:29:07,763 INFO L630 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 [2019-11-27 22:29:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-27 22:29:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-27 22:29:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-27 22:29:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-27 22:29:07,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2019-11-27 22:29:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:07,805 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-27 22:29:07,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:29:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-27 22:29:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 22:29:07,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:07,807 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:07,808 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1772877369, now seen corresponding path program 1 times [2019-11-27 22:29:07,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:07,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690088995] [2019-11-27 22:29:07,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:07,905 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 22:29:07,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690088995] [2019-11-27 22:29:07,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:07,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:29:07,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601096584] [2019-11-27 22:29:07,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:29:07,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:29:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:29:07,909 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-27 22:29:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:07,961 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-27 22:29:07,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:29:07,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-27 22:29:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:07,963 INFO L225 Difference]: With dead ends: 29 [2019-11-27 22:29:07,963 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 22:29:07,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:29:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 22:29:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-27 22:29:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-27 22:29:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-27 22:29:07,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2019-11-27 22:29:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:07,969 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-27 22:29:07,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:29:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-27 22:29:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 22:29:07,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:07,970 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:07,971 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:07,971 INFO L82 PathProgramCache]: Analyzing trace with hash 828058391, now seen corresponding path program 1 times [2019-11-27 22:29:07,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:07,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580360014] [2019-11-27 22:29:07,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:29:08,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580360014] [2019-11-27 22:29:08,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:29:08,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575371549] [2019-11-27 22:29:08,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:29:08,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:29:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:29:08,029 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-27 22:29:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:08,118 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-11-27 22:29:08,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:29:08,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-27 22:29:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:08,121 INFO L225 Difference]: With dead ends: 34 [2019-11-27 22:29:08,121 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 22:29:08,121 INFO L630 BasicCegarLoop]: 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 [2019-11-27 22:29:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 22:29:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-11-27 22:29:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-27 22:29:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-27 22:29:08,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-11-27 22:29:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:08,127 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-27 22:29:08,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:29:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-27 22:29:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 22:29:08,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:08,129 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:08,130 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:08,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1290117262, now seen corresponding path program 1 times [2019-11-27 22:29:08,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:08,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116252727] [2019-11-27 22:29:08,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:29:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:29:08,252 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:29:08,253 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:29:08,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:29:08 BoogieIcfgContainer [2019-11-27 22:29:08,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:29:08,285 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:29:08,285 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:29:08,285 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:29:08,286 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:07" (3/4) ... [2019-11-27 22:29:08,288 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:29:08,338 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:29:08,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:29:08,341 INFO L168 Benchmark]: Toolchain (without parser) took 1624.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -106.3 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,342 INFO L168 Benchmark]: CDTParser took 0.65 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 22:29:08,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.05 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,344 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,345 INFO L168 Benchmark]: Boogie Preprocessor took 30.72 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,345 INFO L168 Benchmark]: RCFGBuilder took 293.25 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: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,346 INFO L168 Benchmark]: TraceAbstraction took 865.43 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: 40.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,347 INFO L168 Benchmark]: Witness Printer took 54.13 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:08,352 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 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 271.05 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 103.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.72 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 293.25 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: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 865.43 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: 40.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 11.5 GB. * Witness Printer took 54.13 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] int *a = malloc(sizeof(int)*N); [L25] i=0 VAL [N=1] [L25] COND TRUE i N [L33] EXPR a[i] [L33] a[i] = a[i] [L30] i++ VAL [N=1] [L30] COND FALSE !(i