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 0.1.24-13a467a-m [2019-10-15 03:03:50,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:50,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:50,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:50,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:50,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:50,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:50,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:50,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:50,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:50,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:50,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:50,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:50,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:50,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:50,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:50,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:50,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:50,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:50,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:50,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:50,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:50,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:50,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:50,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:03:50,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:50,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:50,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:50,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:50,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:50,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:50,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:50,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:50,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:50,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:50,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:50,997 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 [2019-10-15 03:03:51,011 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:51,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:51,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:51,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:51,013 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:51,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:51,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:51,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:51,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:51,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:51,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:51,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:51,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:51,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:51,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:51,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:51,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:51,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:51,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:51,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:51,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:51,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:51,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:51,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:51,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:51,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:51,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:51,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:51,018 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 [2019-10-15 03:03:51,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:51,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:51,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:51,350 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:51,350 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:51,351 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-10-15 03:03:51,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d78ace0/0240120f15ea4b24826582154d20b868/FLAG2d79e5ee3 [2019-10-15 03:03:51,936 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:51,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-10-15 03:03:51,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d78ace0/0240120f15ea4b24826582154d20b868/FLAG2d79e5ee3 [2019-10-15 03:03:52,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d78ace0/0240120f15ea4b24826582154d20b868 [2019-10-15 03:03:52,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:52,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:52,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:52,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:52,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:52,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1a6ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52, skipping insertion in model container [2019-10-15 03:03:52,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,393 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:52,412 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:52,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:52,627 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:52,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:52,656 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:52,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52 WrapperNode [2019-10-15 03:03:52,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:52,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:52,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:52,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:52,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (1/1) ... [2019-10-15 03:03:52,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:52,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:52,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:52,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:52,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (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 [2019-10-15 03:03:52,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 03:03:52,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:52,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-15 03:03:52,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:52,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:52,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:53,198 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:53,199 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:03:53,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:53 BoogieIcfgContainer [2019-10-15 03:03:53,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:53,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:53,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:53,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:52" (1/3) ... [2019-10-15 03:03:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ddf203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:53, skipping insertion in model container [2019-10-15 03:03:53,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:52" (2/3) ... [2019-10-15 03:03:53,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ddf203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:53, skipping insertion in model container [2019-10-15 03:03:53,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:53" (3/3) ... [2019-10-15 03:03:53,212 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-10-15 03:03:53,221 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:53,229 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:53,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:53,269 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:53,269 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:53,269 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:53,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:53,270 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:53,270 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:53,270 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:53,271 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 03:03:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:03:53,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:53,298 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:53,300 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash 971440757, now seen corresponding path program 1 times [2019-10-15 03:03:53,316 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:53,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194408752] [2019-10-15 03:03:53,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:53,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:53,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:53,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194408752] [2019-10-15 03:03:53,563 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:53,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:03:53,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483043281] [2019-10-15 03:03:53,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:03:53,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:03:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:03:53,589 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 03:03:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:53,624 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-15 03:03:53,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:03:53,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 03:03:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:53,636 INFO L225 Difference]: With dead ends: 34 [2019-10-15 03:03:53,637 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 03:03:53,644 INFO L600 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 [2019-10-15 03:03:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 03:03:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 03:03:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 03:03:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-15 03:03:53,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-15 03:03:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:53,691 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-15 03:03:53,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:03:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-15 03:03:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:03:53,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:53,694 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:53,695 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1002477580, now seen corresponding path program 1 times [2019-10-15 03:03:53,697 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:53,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528044596] [2019-10-15 03:03:53,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:53,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:53,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:53,837 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-15 03:03:53,837 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 03:03:53,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:03:53 BoogieIcfgContainer [2019-10-15 03:03:53,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:03:53,875 INFO L168 Benchmark]: Toolchain (without parser) took 1513.02 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 134.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,877 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.04 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 92.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,881 INFO L168 Benchmark]: Boogie Preprocessor took 111.85 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 179.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,883 INFO L168 Benchmark]: RCFGBuilder took 434.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,884 INFO L168 Benchmark]: TraceAbstraction took 666.43 ms. Allocated memory is still 201.3 MB. Free memory was 161.8 MB in the beginning and 134.1 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:53,896 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.04 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 92.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.85 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 179.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 666.43 ms. Allocated memory is still 201.3 MB. Free memory was 161.8 MB in the beginning and 134.1 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 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...