java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/count_up_down_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 04:52:07,386 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 04:52:07,388 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 04:52:07,400 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 04:52:07,401 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 04:52:07,402 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 04:52:07,403 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 04:52:07,406 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 04:52:07,408 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 04:52:07,409 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 04:52:07,417 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 04:52:07,417 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 04:52:07,420 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 04:52:07,423 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 04:52:07,424 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 04:52:07,425 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 04:52:07,426 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 04:52:07,427 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 04:52:07,429 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 04:52:07,431 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 04:52:07,432 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 04:52:07,433 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 04:52:07,435 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 04:52:07,435 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 04:52:07,435 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 04:52:07,436 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 04:52:07,437 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 04:52:07,438 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 04:52:07,439 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 04:52:07,440 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 04:52:07,440 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 04:52:07,441 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 04:52:07,441 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 04:52:07,441 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 04:52:07,442 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 04:52:07,443 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 04:52:07,443 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 04:52:07,469 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 04:52:07,469 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 04:52:07,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 04:52:07,471 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 04:52:07,472 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 04:52:07,472 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 04:52:07,472 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 04:52:07,472 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 04:52:07,473 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 04:52:07,473 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 04:52:07,473 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 04:52:07,473 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 04:52:07,474 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 04:52:07,474 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 04:52:07,474 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 04:52:07,474 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 04:52:07,475 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 04:52:07,475 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 04:52:07,475 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 04:52:07,475 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 04:52:07,475 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 04:52:07,476 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 04:52:07,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 04:52:07,477 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 04:52:07,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 04:52:07,477 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 04:52:07,477 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 04:52:07,478 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 04:52:07,478 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 04:52:07,478 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 04:52:07,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 04:52:07,478 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 04:52:07,479 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 04:52:07,479 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 04:52:07,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 04:52:07,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 04:52:07,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 04:52:07,556 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 04:52:07,556 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 04:52:07,557 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down_false-unreach-call_true-termination.i [2018-11-07 04:52:07,611 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f224c6a2/56307c41c1824566828af12c0e327f12/FLAGc92ebed2c [2018-11-07 04:52:08,043 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 04:52:08,044 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down_false-unreach-call_true-termination.i [2018-11-07 04:52:08,052 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f224c6a2/56307c41c1824566828af12c0e327f12/FLAGc92ebed2c [2018-11-07 04:52:08,068 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f224c6a2/56307c41c1824566828af12c0e327f12 [2018-11-07 04:52:08,079 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 04:52:08,080 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 04:52:08,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 04:52:08,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 04:52:08,085 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 04:52:08,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa5a63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08, skipping insertion in model container [2018-11-07 04:52:08,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 04:52:08,125 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 04:52:08,362 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 04:52:08,365 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 04:52:08,380 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 04:52:08,395 INFO L193 MainTranslator]: Completed translation [2018-11-07 04:52:08,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08 WrapperNode [2018-11-07 04:52:08,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 04:52:08,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 04:52:08,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 04:52:08,397 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 04:52:08,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 04:52:08,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 04:52:08,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 04:52:08,419 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 04:52:08,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (1/1) ... [2018-11-07 04:52:08,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 04:52:08,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 04:52:08,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 04:52:08,442 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 04:52:08,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (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 [2018-11-07 04:52:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 04:52:08,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 04:52:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 04:52:08,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 04:52:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 04:52:08,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 04:52:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 04:52:08,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 04:52:08,772 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 04:52:08,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:52:08 BoogieIcfgContainer [2018-11-07 04:52:08,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 04:52:08,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 04:52:08,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 04:52:08,777 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 04:52:08,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:52:08" (1/3) ... [2018-11-07 04:52:08,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373293fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:52:08, skipping insertion in model container [2018-11-07 04:52:08,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:08" (2/3) ... [2018-11-07 04:52:08,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373293fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:52:08, skipping insertion in model container [2018-11-07 04:52:08,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:52:08" (3/3) ... [2018-11-07 04:52:08,780 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down_false-unreach-call_true-termination.i [2018-11-07 04:52:08,788 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 04:52:08,794 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 04:52:08,808 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 04:52:08,841 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 04:52:08,841 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 04:52:08,842 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 04:52:08,842 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 04:52:08,842 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 04:52:08,842 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 04:52:08,842 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 04:52:08,843 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 04:52:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-11-07 04:52:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-07 04:52:08,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 04:52:08,879 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 04:52:08,881 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 04:52:08,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 04:52:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-11-07 04:52:08,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 04:52:08,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 04:52:08,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 04:52:08,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 04:52:08,940 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 04:52:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 04:52:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 04:52:08,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 04:52:09,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 04:52:09,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 04:52:09,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 04:52:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 04:52:09,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 04:52:09,018 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-11-07 04:52:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 04:52:09,038 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-07 04:52:09,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 04:52:09,039 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-07 04:52:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 04:52:09,048 INFO L225 Difference]: With dead ends: 29 [2018-11-07 04:52:09,048 INFO L226 Difference]: Without dead ends: 12 [2018-11-07 04:52:09,052 INFO L604 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 [2018-11-07 04:52:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-07 04:52:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-07 04:52:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-07 04:52:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-07 04:52:09,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-07 04:52:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 04:52:09,091 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-07 04:52:09,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 04:52:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-07 04:52:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-07 04:52:09,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 04:52:09,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 04:52:09,093 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 04:52:09,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 04:52:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-11-07 04:52:09,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 04:52:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 04:52:09,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 04:52:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 04:52:09,096 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 04:52:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-07 04:52:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-07 04:52:09,149 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-07 04:52:09,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:52:09 BoogieIcfgContainer [2018-11-07 04:52:09,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 04:52:09,185 INFO L168 Benchmark]: Toolchain (without parser) took 1105.56 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -769.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 04:52:09,188 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 04:52:09,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-07 04:52:09,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 04:52:09,193 INFO L168 Benchmark]: Boogie Preprocessor took 22.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 04:52:09,195 INFO L168 Benchmark]: RCFGBuilder took 330.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2018-11-07 04:52:09,196 INFO L168 Benchmark]: TraceAbstraction took 410.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2018-11-07 04:52:09,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 21.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 330.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 410.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int n = __VERIFIER_nondet_uint(); [L14] unsigned int x=n, y=0; VAL [n=0, x=0, y=0] [L15] COND FALSE !(x>0) VAL [n=0, x=0, y=0] [L20] CALL __VERIFIER_assert(y!=n) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 18 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=18occurred 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...