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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:02:54,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:02:54,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:02:54,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:02:54,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:02:54,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:02:54,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:02:54,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:02:54,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:02:54,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:02:54,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:02:54,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:02:54,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:02:54,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:02:54,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:02:54,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:02:54,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:02:54,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:02:54,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:02:54,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:02:54,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:02:54,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:02:54,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:02:54,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:02:54,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:02:54,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:02:54,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:02:54,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:02:54,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:02:54,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:02:54,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:02:54,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:02:54,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:02:54,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:02:54,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:02:54,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:02:54,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:02:54,723 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:02:54,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:02:54,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:02:54,724 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:02:54,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:02:54,725 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:02:54,725 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:02:54,725 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:02:54,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:02:54,726 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:02:54,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:02:54,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:02:54,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:02:54,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:02:54,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:02:54,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:02:54,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:02:54,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:02:54,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:02:54,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:02:54,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:02:54,729 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:02:54,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:02:54,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:02:54,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:02:54,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:02:54,730 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:02:54,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:02:54,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:02:54,730 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:02:54,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:02:54,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:02:54,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:02:54,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:02:54,786 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:02:54,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-09-16 17:02:54,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ec9ecf5/f896d905e2f145aea6f252ffaabda1df/FLAG00bdc37fe [2019-09-16 17:02:55,296 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:02:55,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-09-16 17:02:55,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ec9ecf5/f896d905e2f145aea6f252ffaabda1df/FLAG00bdc37fe [2019-09-16 17:02:55,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ec9ecf5/f896d905e2f145aea6f252ffaabda1df [2019-09-16 17:02:55,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:02:55,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:02:55,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:02:55,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:02:55,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:02:55,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:55,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148b2de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55, skipping insertion in model container [2019-09-16 17:02:55,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:55,733 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:02:55,750 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:02:55,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:02:55,946 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:02:55,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:02:55,975 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:02:55,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55 WrapperNode [2019-09-16 17:02:55,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:02:55,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:02:55,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:02:55,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:02:56,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (1/1) ... [2019-09-16 17:02:56,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:02:56,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:02:56,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:02:56,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:02:56,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (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 [2019-09-16 17:02:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:02:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:02:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:02:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:02:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:02:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-16 17:02:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:02:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-16 17:02:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:02:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:02:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:02:56,404 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:02:56,405 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 17:02:56,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:02:56 BoogieIcfgContainer [2019-09-16 17:02:56,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:02:56,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:02:56,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:02:56,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:02:56,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:02:55" (1/3) ... [2019-09-16 17:02:56,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13fe821e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:02:56, skipping insertion in model container [2019-09-16 17:02:56,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:55" (2/3) ... [2019-09-16 17:02:56,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13fe821e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:02:56, skipping insertion in model container [2019-09-16 17:02:56,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:02:56" (3/3) ... [2019-09-16 17:02:56,428 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-09-16 17:02:56,451 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:02:56,472 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:02:56,525 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:02:56,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:02:56,572 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:02:56,572 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:02:56,572 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:02:56,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:02:56,573 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:02:56,573 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:02:56,573 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:02:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-09-16 17:02:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-16 17:02:56,595 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:02:56,596 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:02:56,598 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:02:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2019-09-16 17:02:56,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:02:56,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:02:56,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,653 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:02:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:02:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:02:56,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:02:56,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:02:56,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:02:56,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:02:56,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:02:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:02:56,861 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-09-16 17:02:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:02:56,902 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-09-16 17:02:56,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:02:56,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-16 17:02:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:02:56,916 INFO L225 Difference]: With dead ends: 28 [2019-09-16 17:02:56,916 INFO L226 Difference]: Without dead ends: 17 [2019-09-16 17:02:56,919 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:02:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-16 17:02:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-16 17:02:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-16 17:02:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-09-16 17:02:56,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-09-16 17:02:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:02:56,965 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-09-16 17:02:56,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:02:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-09-16 17:02:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 17:02:56,966 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:02:56,966 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:02:56,967 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:02:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2019-09-16 17:02:56,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:02:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:02:56,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:02:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 17:02:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 17:02:57,058 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-16 17:02:57,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:02:57 BoogieIcfgContainer [2019-09-16 17:02:57,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:02:57,096 INFO L168 Benchmark]: Toolchain (without parser) took 1375.06 ms. Allocated memory was 137.4 MB in the beginning and 197.1 MB in the end (delta: 59.8 MB). Free memory was 85.1 MB in the beginning and 132.8 MB in the end (delta: -47.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,098 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 103.5 MB in the beginning and 103.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.04 ms. Allocated memory is still 137.4 MB. Free memory was 84.9 MB in the beginning and 74.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,102 INFO L168 Benchmark]: Boogie Preprocessor took 138.14 ms. Allocated memory was 137.4 MB in the beginning and 197.1 MB in the end (delta: 59.8 MB). Free memory was 74.7 MB in the beginning and 173.7 MB in the end (delta: -98.9 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,103 INFO L168 Benchmark]: RCFGBuilder took 296.57 ms. Allocated memory is still 197.1 MB. Free memory was 173.7 MB in the beginning and 160.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,105 INFO L168 Benchmark]: TraceAbstraction took 677.50 ms. Allocated memory is still 197.1 MB. Free memory was 160.6 MB in the beginning and 132.8 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,115 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 103.5 MB in the beginning and 103.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.04 ms. Allocated memory is still 137.4 MB. Free memory was 84.9 MB in the beginning and 74.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.14 ms. Allocated memory was 137.4 MB in the beginning and 197.1 MB in the end (delta: 59.8 MB). Free memory was 74.7 MB in the beginning and 173.7 MB in the end (delta: -98.9 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.57 ms. Allocated memory is still 197.1 MB. Free memory was 173.7 MB in the beginning and 160.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 677.50 ms. Allocated memory is still 197.1 MB. Free memory was 160.6 MB in the beginning and 132.8 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 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; VAL [\old(b)=258, b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; VAL [b=0, k=1] [L17] COND TRUE \read(k) [L18] n=0 VAL [b=0, k=1, n=0] [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L28] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L33] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=1, 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, 25 locations, 1 error locations. UNSAFE Result, 0.5s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 21 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 476 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...