/usr/bin/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:35:45,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:35:45,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:35:45,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:35:45,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:35:45,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:35:45,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:35:45,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:35:45,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:35:45,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:35:45,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:35:45,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:35:45,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:35:45,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:35:45,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:35:45,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:35:45,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:35:45,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:35:45,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:35:45,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:35:45,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:35:45,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:35:45,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:35:45,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:35:45,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:35:45,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:35:45,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:35:45,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:35:45,375 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 [2019-11-07 00:35:45,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:35:45,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:35:45,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:35:45,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:35:45,390 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:35:45,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:35:45,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:35:45,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:35:45,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:35:45,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:35:45,392 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:35:45,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:35:45,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:35:45,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:35:45,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:35:45,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:35:45,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:45,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:35:45,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:35:45,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:35:45,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:35:45,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:35:45,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:35:45,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:35:45,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:35:45,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:35:45,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:35:45,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:35:45,679 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:35:45,680 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-11-07 00:35:45,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29571ba85/507857b0e72a4be792ca2e2fdb957386/FLAG97ce34b78 [2019-11-07 00:35:46,180 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:35:46,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-11-07 00:35:46,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29571ba85/507857b0e72a4be792ca2e2fdb957386/FLAG97ce34b78 [2019-11-07 00:35:46,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29571ba85/507857b0e72a4be792ca2e2fdb957386 [2019-11-07 00:35:46,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:35:46,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:35:46,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:46,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:35:46,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:35:46,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60924fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46, skipping insertion in model container [2019-11-07 00:35:46,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,611 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:35:46,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:35:46,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:46,847 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:35:46,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:46,879 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:35:46,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46 WrapperNode [2019-11-07 00:35:46,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:46,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:35:46,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:35:46,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:35:46,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:46,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... [2019-11-07 00:35:47,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:35:47,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:35:47,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:35:47,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:35:47,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:35:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:35:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:35:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:35:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:35:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 00:35:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:35:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-07 00:35:47,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:35:47,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:35:47,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:35:47,242 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:35:47,242 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:35:47,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:47 BoogieIcfgContainer [2019-11-07 00:35:47,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:35:47,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:35:47,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:35:47,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:35:47,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:35:46" (1/3) ... [2019-11-07 00:35:47,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afa9844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:47, skipping insertion in model container [2019-11-07 00:35:47,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:46" (2/3) ... [2019-11-07 00:35:47,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afa9844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:47, skipping insertion in model container [2019-11-07 00:35:47,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:47" (3/3) ... [2019-11-07 00:35:47,254 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-11-07 00:35:47,276 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:35:47,293 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:35:47,312 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:35:47,343 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:35:47,343 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:35:47,344 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:35:47,344 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:35:47,344 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:35:47,344 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:35:47,344 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:35:47,344 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:35:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 00:35:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 00:35:47,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:47,401 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:47,403 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2019-11-07 00:35:47,426 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:47,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686669152] [2019-11-07 00:35:47,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:47,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686669152] [2019-11-07 00:35:47,641 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:47,642 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:35:47,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295393057] [2019-11-07 00:35:47,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:35:47,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:35:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:35:47,666 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-07 00:35:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:47,710 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-07 00:35:47,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:35:47,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-07 00:35:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:47,721 INFO L225 Difference]: With dead ends: 43 [2019-11-07 00:35:47,721 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 00:35:47,725 INFO L630 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 [2019-11-07 00:35:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 00:35:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 00:35:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 00:35:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-07 00:35:47,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-07 00:35:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:47,762 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-07 00:35:47,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:35:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-07 00:35:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 00:35:47,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:47,764 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:47,764 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2019-11-07 00:35:47,765 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:47,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808149475] [2019-11-07 00:35:47,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:35:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:35:47,848 INFO L172 FreeRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-11-07 00:35:47,849 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-07 00:35:47,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:35:47 BoogieIcfgContainer [2019-11-07 00:35:47,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:35:47,878 INFO L168 Benchmark]: Toolchain (without parser) took 1283.85 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 99.6 MB in the beginning and 137.8 MB in the end (delta: -38.2 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,879 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.11 ms. Allocated memory is still 136.3 MB. Free memory was 99.4 MB in the beginning and 89.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,881 INFO L168 Benchmark]: Boogie Preprocessor took 123.07 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 89.6 MB in the beginning and 178.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,882 INFO L168 Benchmark]: RCFGBuilder took 239.80 ms. Allocated memory is still 200.3 MB. Free memory was 178.1 MB in the beginning and 165.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,883 INFO L168 Benchmark]: TraceAbstraction took 630.37 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 137.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:47,887 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 136.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.11 ms. Allocated memory is still 136.3 MB. Free memory was 99.4 MB in the beginning and 89.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.07 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 89.6 MB in the beginning and 178.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.80 ms. Allocated memory is still 200.3 MB. Free memory was 178.1 MB in the beginning and 165.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 630.37 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 137.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 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. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, 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 DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s 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, 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...