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/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:31:55,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:31:55,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:31:55,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:31:55,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:31:55,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:31:55,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:31:55,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:31:55,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:31:55,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:31:55,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:31:55,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:31:55,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:31:55,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:31:55,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:31:55,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:31:55,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:31:55,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:31:55,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:31:55,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:31:55,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:31:55,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:31:55,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:31:55,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:31:55,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:31:55,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:31:55,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:31:55,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:31:55,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 13:31:55,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:31:55,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:31:55,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:31:55,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:31:55,993 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:31:55,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:31:55,993 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:31:55,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:31:55,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:31:55,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:31:55,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:31:55,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:31:55,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:31:55,994 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:31:55,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:31:55,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:31:55,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:31:55,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:31:55,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:31:55,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:31:55,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:31:55,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:31:55,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:31:55,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:31:55,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:31:55,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:31:55,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:31:55,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:31:55,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 13:31:56,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:31:56,305 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:31:56,308 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:31:56,310 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:31:56,310 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:31:56,311 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-07 13:31:56,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e461daf/81166e9eb6a74416a80f4ee40cb70c5c/FLAG00048922e [2019-10-07 13:31:56,861 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:31:56,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-07 13:31:56,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e461daf/81166e9eb6a74416a80f4ee40cb70c5c/FLAG00048922e [2019-10-07 13:31:57,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e461daf/81166e9eb6a74416a80f4ee40cb70c5c [2019-10-07 13:31:57,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:31:57,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:31:57,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:31:57,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:31:57,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:31:57,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd445f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57, skipping insertion in model container [2019-10-07 13:31:57,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:31:57,253 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:31:57,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:31:57,483 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:31:57,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:31:57,519 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:31:57,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57 WrapperNode [2019-10-07 13:31:57,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:31:57,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:31:57,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:31:57,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:31:57,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... [2019-10-07 13:31:57,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:31:57,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:31:57,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:31:57,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:31:57,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:31:57,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:31:57,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:31:57,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:31:57,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:31:57,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:31:57,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:31:57,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:31:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:31:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:31:57,867 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:31:57,867 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:31:57,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:31:57 BoogieIcfgContainer [2019-10-07 13:31:57,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:31:57,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:31:57,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:31:57,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:31:57,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:31:57" (1/3) ... [2019-10-07 13:31:57,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c6d9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:31:57, skipping insertion in model container [2019-10-07 13:31:57,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:31:57" (2/3) ... [2019-10-07 13:31:57,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c6d9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:31:57, skipping insertion in model container [2019-10-07 13:31:57,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:31:57" (3/3) ... [2019-10-07 13:31:57,877 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-10-07 13:31:57,887 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:31:57,895 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:31:57,906 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:31:57,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:31:57,933 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:31:57,933 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:31:57,933 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:31:57,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:31:57,934 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:31:57,934 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:31:57,934 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:31:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-07 13:31:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-07 13:31:57,958 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:31:57,959 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:31:57,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:31:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:31:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1869232855, now seen corresponding path program 1 times [2019-10-07 13:31:57,975 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:31:57,975 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:31:57,976 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:57,976 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:31:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:31:58,320 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-10-07 13:31:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:31:58,349 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:31:58,349 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:31:58,350 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:31:58,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:31:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:31:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:31:58,373 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-10-07 13:31:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:31:58,425 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-07 13:31:58,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 13:31:58,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-07 13:31:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:31:58,437 INFO L225 Difference]: With dead ends: 29 [2019-10-07 13:31:58,437 INFO L226 Difference]: Without dead ends: 12 [2019-10-07 13:31:58,441 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:31:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-07 13:31:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-07 13:31:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-07 13:31:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-07 13:31:58,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-07 13:31:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:31:58,485 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-07 13:31:58,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:31:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-07 13:31:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 13:31:58,487 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:31:58,487 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:31:58,487 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:31:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:31:58,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1455464170, now seen corresponding path program 1 times [2019-10-07 13:31:58,488 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:31:58,488 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:31:58,489 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:58,489 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:31:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:31:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:31:58,624 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:31:58,625 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:31:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:31:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:31:58,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 13:31:58,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:31:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:31:58,723 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:31:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:31:58,800 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:31:58,832 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-07 13:31:58,832 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:31:58,858 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:31:58,872 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:31:58,873 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:31:58,946 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:31:59,168 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:31:59,225 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:31:59,233 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:31:59,233 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:31:59,234 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 76#(and (not (< (mod main_~x~0 4294967296) 6)) (<= 0 main_~x~0)) [2019-10-07 13:31:59,234 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:31:59,234 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:31:59,234 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 105#true [2019-10-07 13:31:59,235 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 71#(<= 0 main_~x~0) [2019-10-07 13:31:59,235 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:31:59,235 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 100#true [2019-10-07 13:31:59,236 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 96#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:31:59,236 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 91#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:31:59,236 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 81#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-07 13:31:59,237 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 86#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:31:59,376 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:31:59,376 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6, 6] total 13 [2019-10-07 13:31:59,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-07 13:31:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-07 13:31:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-07 13:31:59,380 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 13 states. [2019-10-07 13:31:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:31:59,692 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-07 13:31:59,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-07 13:31:59,693 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2019-10-07 13:31:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:31:59,693 INFO L225 Difference]: With dead ends: 23 [2019-10-07 13:31:59,694 INFO L226 Difference]: Without dead ends: 15 [2019-10-07 13:31:59,695 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-10-07 13:31:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-07 13:31:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-07 13:31:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-07 13:31:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-07 13:31:59,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-07 13:31:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:31:59,700 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-07 13:31:59,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-07 13:31:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-07 13:31:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-07 13:31:59,701 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:31:59,701 INFO L385 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:31:59,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:31:59,908 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:31:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:31:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1007933545, now seen corresponding path program 2 times [2019-10-07 13:31:59,908 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:31:59,909 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:31:59,909 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:59,909 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:31:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:31:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:32:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:32:00,061 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:32:00,064 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:32:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:32:00,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-07 13:32:00,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:32:00,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-07 13:32:00,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:32:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:32:00,139 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:32:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:32:00,278 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:32:00,280 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-07 13:32:00,280 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:32:00,281 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:32:00,282 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:32:00,283 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:32:00,310 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:32:00,408 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:32:00,453 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:32:00,457 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:32:00,457 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:32:00,458 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 76#(and (not (< (mod main_~x~0 4294967296) 6)) (<= 0 main_~x~0)) [2019-10-07 13:32:00,458 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:32:00,458 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:32:00,458 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 105#true [2019-10-07 13:32:00,459 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 71#(<= 0 main_~x~0) [2019-10-07 13:32:00,460 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:32:00,460 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 100#true [2019-10-07 13:32:00,461 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 96#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:32:00,461 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 91#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:32:00,462 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 81#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-07 13:32:00,462 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 86#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:32:00,633 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:32:00,633 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 6] total 20 [2019-10-07 13:32:00,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-07 13:32:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-07 13:32:00,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-10-07 13:32:00,635 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 20 states. [2019-10-07 13:32:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:32:01,091 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-07 13:32:01,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-07 13:32:01,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-10-07 13:32:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:32:01,093 INFO L225 Difference]: With dead ends: 29 [2019-10-07 13:32:01,093 INFO L226 Difference]: Without dead ends: 21 [2019-10-07 13:32:01,095 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2019-10-07 13:32:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-07 13:32:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-07 13:32:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-07 13:32:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-07 13:32:01,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-07 13:32:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:32:01,101 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-07 13:32:01,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-07 13:32:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-07 13:32:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-07 13:32:01,102 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:32:01,102 INFO L385 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:32:01,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:32:01,307 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:32:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:32:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1779402249, now seen corresponding path program 3 times [2019-10-07 13:32:01,308 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:32:01,308 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:32:01,309 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:32:01,309 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:32:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:32:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:32:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:32:01,374 INFO L161 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-07 13:32:01,374 INFO L451 BasicCegarLoop]: Counterexample might be feasible [2019-10-07 13:32:01,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:32:01 BoogieIcfgContainer [2019-10-07 13:32:01,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:32:01,412 INFO L168 Benchmark]: Toolchain (without parser) took 4191.13 ms. Allocated memory was 135.3 MB in the beginning and 250.6 MB in the end (delta: 115.3 MB). Free memory was 101.4 MB in the beginning and 204.6 MB in the end (delta: -103.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,418 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.29 ms. Allocated memory is still 135.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,421 INFO L168 Benchmark]: Boogie Preprocessor took 111.25 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 178.5 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,422 INFO L168 Benchmark]: RCFGBuilder took 236.42 ms. Allocated memory is still 199.2 MB. Free memory was 178.5 MB in the beginning and 168.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,423 INFO L168 Benchmark]: TraceAbstraction took 3539.48 ms. Allocated memory was 199.2 MB in the beginning and 250.6 MB in the end (delta: 51.4 MB). Free memory was 167.2 MB in the beginning and 204.6 MB in the end (delta: -37.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-07 13:32:01,434 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.29 ms. Allocated memory is still 135.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.25 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 178.5 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 236.42 ms. Allocated memory is still 199.2 MB. Free memory was 178.5 MB in the beginning and 168.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3539.48 ms. Allocated memory was 199.2 MB in the beginning and 250.6 MB in the end (delta: 51.4 MB). Free memory was 167.2 MB in the beginning and 204.6 MB in the end (delta: -37.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 36 SDslu, 139 SDs, 0 SdLazy, 162 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3048 SizeOfPredicates, 0 NumberOfNonLiveVariables, 73 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 587, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 42, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME[ms]: 26, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME[ms]: 22, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME[ms]: 1, TOOLS_QUANTIFIERELIM_APPLICATIONS: 34, TOOLS_QUANTIFIERELIM_TIME[ms]: 39, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 13, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 36, DOMAIN_JOIN_TIME[ms]: 293, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 84, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 19, DOMAIN_ISBOTTOM_APPLICATIONS: 2, DOMAIN_ISBOTTOM_TIME[ms]: 2, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 249, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 248, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME[ms]: 14, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 13, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 6, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 33, DAG_COMPRESSION_PROCESSED_NODES: 114, DAG_COMPRESSION_RETAINED_NODES: 82, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...