./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/trex02_false-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/trex02_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f23dff6f0d8a8ba60eb97a090e77b1c3a0ff5fb --rcfgbuilder.size.of.a.code.block LoopFreeBlock ............................................................................................................................................................................................................................................................................. 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 0.1.23-0210da8 [2018-10-22 10:04:38,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:04:38,667 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:04:38,680 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:04:38,680 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:04:38,681 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:04:38,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:04:38,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:04:38,686 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:04:38,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:04:38,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:04:38,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:04:38,689 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:04:38,690 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:04:38,691 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:04:38,692 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:04:38,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:04:38,695 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:04:38,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:04:38,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:04:38,700 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:04:38,701 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:04:38,704 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:04:38,704 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:04:38,704 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:04:38,705 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:04:38,706 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:04:38,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:04:38,708 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:04:38,709 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:04:38,710 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:04:38,710 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:04:38,711 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:04:38,711 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:04:38,712 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:04:38,713 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:04:38,713 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:04:38,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:04:38,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:04:38,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:04:38,748 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:04:38,748 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:04:38,748 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:04:38,748 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:04:38,748 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:04:38,748 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:04:38,753 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:04:38,754 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:04:38,755 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:04:38,755 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:04:38,755 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:04:38,755 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:04:38,756 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:04:38,756 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:04:38,756 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:04:38,756 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:04:38,756 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:04:38,757 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:04:38,760 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:04:38,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:04:38,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:04:38,761 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:04:38,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:04:38,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:04:38,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:04:38,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:04:38,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:04:38,762 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:04:38,763 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:04:38,763 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:04:38,763 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:04:38,763 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/UTaipan-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 -> Taipan 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 -> 6f23dff6f0d8a8ba60eb97a090e77b1c3a0ff5fb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:04:38,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:04:38,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:04:38,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:04:38,862 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:04:38,862 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:04:38,863 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/trex02_false-unreach-call_true-termination.i [2018-10-22 10:04:38,935 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9c2df8e1/e57617c2784d471792e3a6e77abb6276/FLAG95509cf61 [2018-10-22 10:04:39,444 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:04:39,445 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02_false-unreach-call_true-termination.i [2018-10-22 10:04:39,451 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9c2df8e1/e57617c2784d471792e3a6e77abb6276/FLAG95509cf61 [2018-10-22 10:04:39,467 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9c2df8e1/e57617c2784d471792e3a6e77abb6276 [2018-10-22 10:04:39,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:04:39,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:04:39,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:04:39,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:04:39,479 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:04:39,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8267af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39, skipping insertion in model container [2018-10-22 10:04:39,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:04:39,516 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:04:39,744 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:04:39,748 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:04:39,769 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:04:39,789 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:04:39,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39 WrapperNode [2018-10-22 10:04:39,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:04:39,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:04:39,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:04:39,791 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:04:39,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:04:39,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:04:39,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:04:39,819 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:04:39,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... [2018-10-22 10:04:39,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:04:39,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:04:39,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:04:39,853 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:04:39,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 10:04:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:04:39,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:04:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-10-22 10:04:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-10-22 10:04:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:04:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:04:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:04:39,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:04:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:04:39,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:04:40,392 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:04:40,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:40 BoogieIcfgContainer [2018-10-22 10:04:40,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:04:40,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:04:40,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:04:40,399 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:04:40,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:04:39" (1/3) ... [2018-10-22 10:04:40,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df07844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:04:40, skipping insertion in model container [2018-10-22 10:04:40,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:39" (2/3) ... [2018-10-22 10:04:40,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df07844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:04:40, skipping insertion in model container [2018-10-22 10:04:40,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:40" (3/3) ... [2018-10-22 10:04:40,405 INFO L112 eAbstractionObserver]: Analyzing ICFG trex02_false-unreach-call_true-termination.i [2018-10-22 10:04:40,417 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:04:40,426 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:04:40,445 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:04:40,490 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:04:40,491 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:04:40,492 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:04:40,492 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:04:40,492 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:04:40,492 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:04:40,492 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:04:40,492 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:04:40,493 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:04:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-22 10:04:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:04:40,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:40,525 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:40,528 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:40,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1589780687, now seen corresponding path program 1 times [2018-10-22 10:04:40,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:40,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:40,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:40,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:40,593 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:40,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:04:40,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:04:40,664 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:04:40,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:04:40,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:04:40,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:04:40,689 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-10-22 10:04:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:40,714 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-22 10:04:40,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:04:40,716 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:04:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:40,728 INFO L225 Difference]: With dead ends: 34 [2018-10-22 10:04:40,729 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 10:04:40,732 INFO L605 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 [2018-10-22 10:04:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 10:04:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-22 10:04:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 10:04:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-22 10:04:40,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2018-10-22 10:04:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:40,778 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-22 10:04:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:04:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-22 10:04:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:04:40,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:40,781 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:40,782 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:40,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1548734510, now seen corresponding path program 1 times [2018-10-22 10:04:40,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:40,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:40,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 10:04:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 10:04:40,827 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 10:04:40,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:04:40 BoogieIcfgContainer [2018-10-22 10:04:40,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:04:40,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:04:40,860 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:04:40,860 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:04:40,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:40" (3/4) ... [2018-10-22 10:04:40,863 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 10:04:40,914 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:04:40,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:04:40,917 INFO L168 Benchmark]: Toolchain (without parser) took 1445.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.9 MB in the beginning and 1.1 GB in the end (delta: -140.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:40,919 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:40,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.59 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:40,922 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.96 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:40,923 INFO L168 Benchmark]: Boogie Preprocessor took 32.19 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:40,923 INFO L168 Benchmark]: RCFGBuilder took 541.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -182.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:40,928 INFO L168 Benchmark]: TraceAbstraction took 465.14 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:40,929 INFO L168 Benchmark]: Witness Printer took 56.74 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:40,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.59 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 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 27.96 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.19 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 541.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -182.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 465.14 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * Witness Printer took 56.74 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x; [L15] x=__VERIFIER_nondet_int() [L16] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L21] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 25 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...