java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:46:09,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:46:09,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:46:09,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:46:09,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:46:09,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:46:09,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:46:09,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:46:09,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:46:09,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:46:09,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:46:09,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:46:09,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:46:09,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:46:09,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:46:09,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:46:09,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:46:09,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:46:09,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:46:09,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:46:09,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:46:09,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:46:09,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:46:09,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:46:09,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:46:09,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:46:09,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:46:09,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:46:09,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:46:09,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:46:09,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:46:09,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:46:09,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:46:09,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:46:09,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:46:09,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:46:09,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 13:46:09,529 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:46:09,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:46:09,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:46:09,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:46:09,532 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:46:09,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:46:09,532 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:46:09,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:46:09,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:46:09,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:46:09,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:46:09,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:46:09,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:46:09,534 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:46:09,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:46:09,535 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:46:09,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:46:09,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:46:09,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:46:09,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:46:09,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:46:09,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:46:09,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:46:09,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:46:09,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:46:09,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:46:09,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:46:09,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:46:09,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 13:46:09,797 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:46:09,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:46:09,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:46:09,820 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:46:09,820 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:46:09,821 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-10-07 13:46:09,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4248efd8/06748b59e0b3437ea58faeb75b7c3c36/FLAGe2e719d12 [2019-10-07 13:46:10,303 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:46:10,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-10-07 13:46:10,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4248efd8/06748b59e0b3437ea58faeb75b7c3c36/FLAGe2e719d12 [2019-10-07 13:46:10,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4248efd8/06748b59e0b3437ea58faeb75b7c3c36 [2019-10-07 13:46:10,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:46:10,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:46:10,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:46:10,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:46:10,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:46:10,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:10,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a972dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10, skipping insertion in model container [2019-10-07 13:46:10,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:10,738 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:46:10,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:46:10,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:46:10,932 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:46:10,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:46:10,964 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:46:10,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10 WrapperNode [2019-10-07 13:46:10,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:46:10,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:46:10,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:46:10,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:46:11,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (1/1) ... [2019-10-07 13:46:11,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:46:11,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:46:11,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:46:11,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:46:11,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (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 [2019-10-07 13:46:11,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:46:11,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:46:11,143 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:46:11,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:46:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:46:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-07 13:46:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:46:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-07 13:46:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:46:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:46:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:46:11,474 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:46:11,474 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:46:11,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:46:11 BoogieIcfgContainer [2019-10-07 13:46:11,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:46:11,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:46:11,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:46:11,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:46:11,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:46:10" (1/3) ... [2019-10-07 13:46:11,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ef653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:46:11, skipping insertion in model container [2019-10-07 13:46:11,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:46:10" (2/3) ... [2019-10-07 13:46:11,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ef653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:46:11, skipping insertion in model container [2019-10-07 13:46:11,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:46:11" (3/3) ... [2019-10-07 13:46:11,484 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-10-07 13:46:11,495 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:46:11,505 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:46:11,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:46:11,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:46:11,538 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:46:11,539 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:46:11,539 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:46:11,539 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:46:11,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:46:11,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:46:11,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:46:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-07 13:46:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 13:46:11,560 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:46:11,560 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:46:11,562 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:46:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:46:11,567 INFO L82 PathProgramCache]: Analyzing trace with hash 971440757, now seen corresponding path program 1 times [2019-10-07 13:46:11,576 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:46:11,576 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:46:11,577 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:46:11,577 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:46:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:46:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:46:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:46:11,792 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:46:11,793 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:46:11,793 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 13:46:11,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 13:46:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 13:46:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 13:46:11,828 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-07 13:46:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:46:11,868 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-07 13:46:11,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 13:46:11,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 13:46:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:46:11,879 INFO L225 Difference]: With dead ends: 34 [2019-10-07 13:46:11,879 INFO L226 Difference]: Without dead ends: 13 [2019-10-07 13:46:11,883 INFO L606 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 [2019-10-07 13:46:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-07 13:46:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-07 13:46:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-07 13:46:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-07 13:46:11,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-07 13:46:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:46:11,924 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-07 13:46:11,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 13:46:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-07 13:46:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-07 13:46:11,931 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:46:11,931 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:46:11,932 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:46:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:46:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1002477580, now seen corresponding path program 1 times [2019-10-07 13:46:11,934 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:46:11,935 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:46:11,936 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:46:11,936 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:46:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:46:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:46:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:46:12,104 INFO L161 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-07 13:46:12,104 INFO L451 BasicCegarLoop]: Counterexample might be feasible [2019-10-07 13:46:12,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:46:12 BoogieIcfgContainer [2019-10-07 13:46:12,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:46:12,141 INFO L168 Benchmark]: Toolchain (without parser) took 1417.52 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.6 MB in the beginning and 137.6 MB in the end (delta: -33.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,143 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.90 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,149 INFO L168 Benchmark]: Boogie Preprocessor took 116.93 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,150 INFO L168 Benchmark]: RCFGBuilder took 393.17 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 165.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,151 INFO L168 Benchmark]: TraceAbstraction took 659.89 ms. Allocated memory is still 203.9 MB. Free memory was 165.5 MB in the beginning and 137.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:46:12,163 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.90 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.93 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.17 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 165.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 659.89 ms. Allocated memory is still 203.9 MB. Free memory was 165.5 MB in the beginning and 137.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; [L17] COND TRUE \read(k) [L18] n=0 [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=255, n=0] [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 VAL [b=0, i=1, j=-4294966271, k=255, n=0] [L28] COND FALSE !(i <= n) [L33] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=255, n=0] [L34] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, b=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 2 SDslu, 15 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 300 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...