/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:24:45,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:24:45,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:24:45,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:24:45,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:24:45,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:24:45,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:24:45,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:24:45,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:24:45,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:24:45,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:24:45,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:24:45,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:24:45,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:24:45,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:24:45,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:24:45,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:24:45,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:24:45,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:24:45,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:24:45,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:24:45,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:24:45,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:24:45,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:24:45,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:24:45,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:24:45,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:24:45,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:24:45,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:24:45,903 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:24:45,903 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:24:45,904 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:24:45,904 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:24:45,904 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:24:45,904 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:24:45,904 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:24:45,905 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:24:45,905 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:24:45,905 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:24:45,905 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:24:45,905 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:24:45,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:24:45,906 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:24:45,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:24:45,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:24:45,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:24:45,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:24:45,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:24:45,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:24:45,908 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:24:45,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:24:45,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:24:45,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:24:45,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:24:45,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:24:45,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:24:45,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:24:45,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:24:45,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:24:45,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:24:45,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:24:45,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:24:45,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:24:45,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:24:46,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:24:46,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:24:46,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:24:46,199 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:24:46,200 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:24:46,200 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2019-11-24 04:24:46,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d7bbb19/1de88c0d9c7b4c09939ed0f0282500c9/FLAG4775ab999 [2019-11-24 04:24:46,696 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:24:46,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i [2019-11-24 04:24:46,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d7bbb19/1de88c0d9c7b4c09939ed0f0282500c9/FLAG4775ab999 [2019-11-24 04:24:47,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d7bbb19/1de88c0d9c7b4c09939ed0f0282500c9 [2019-11-24 04:24:47,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:24:47,104 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:24:47,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:47,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:24:47,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:24:47,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290fac66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47, skipping insertion in model container [2019-11-24 04:24:47,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:24:47,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:24:47,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:47,330 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:24:47,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:47,359 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:24:47,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47 WrapperNode [2019-11-24 04:24:47,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:47,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:47,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:24:47,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:24:47,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:47,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:24:47,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:24:47,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:24:47,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (1/1) ... [2019-11-24 04:24:47,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:24:47,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:24:47,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:24:47,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:24:47,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (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 [2019-11-24 04:24:47,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:24:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:24:47,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:24:47,891 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:24:47,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:47 BoogieIcfgContainer [2019-11-24 04:24:47,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:24:47,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:24:47,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:24:47,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:24:47,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:24:47" (1/3) ... [2019-11-24 04:24:47,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746ef04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:47, skipping insertion in model container [2019-11-24 04:24:47,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:47" (2/3) ... [2019-11-24 04:24:47,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746ef04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:47, skipping insertion in model container [2019-11-24 04:24:47,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:47" (3/3) ... [2019-11-24 04:24:47,905 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-1.i [2019-11-24 04:24:47,919 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:24:47,925 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:24:47,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:24:47,955 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:24:47,955 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:24:47,955 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:24:47,955 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:24:47,955 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:24:47,956 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:24:47,956 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:24:47,956 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:24:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 04:24:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:24:47,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:47,973 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:24:47,973 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash 922057718, now seen corresponding path program 1 times [2019-11-24 04:24:47,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:47,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505191996] [2019-11-24 04:24:47,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:48,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505191996] [2019-11-24 04:24:48,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:24:48,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:24:48,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346225006] [2019-11-24 04:24:48,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:24:48,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:24:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:24:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:24:48,160 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-11-24 04:24:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:24:48,230 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2019-11-24 04:24:48,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:24:48,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:24:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:24:48,245 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:24:48,246 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:24:48,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:24:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 04:24:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:24:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:24:48,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:24:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:24:48,295 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:24:48,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:24:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:24:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:24:48,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:48,296 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:24:48,297 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:48,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1299572786, now seen corresponding path program 1 times [2019-11-24 04:24:48,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:48,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465533956] [2019-11-24 04:24:48,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:48,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465533956] [2019-11-24 04:24:48,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:24:48,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:24:48,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589375527] [2019-11-24 04:24:48,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:24:48,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:24:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:24:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:24:48,349 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-24 04:24:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:24:48,384 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2019-11-24 04:24:48,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:24:48,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:24:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:24:48,388 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:24:48,388 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:24:48,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:24:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 04:24:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 04:24:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-24 04:24:48,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-24 04:24:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:24:48,395 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-24 04:24:48,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:24:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-24 04:24:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:24:48,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:48,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:24:48,397 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1629236874, now seen corresponding path program 1 times [2019-11-24 04:24:48,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:48,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662361412] [2019-11-24 04:24:48,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:48,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662361412] [2019-11-24 04:24:48,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119298367] [2019-11-24 04:24:48,486 INFO L94 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 [2019-11-24 04:24:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:48,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 04:24:48,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:48,608 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:48,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176735113] [2019-11-24 04:24:48,693 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:24:48,694 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:24:48,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:24:48,707 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:24:48,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:24:49,834 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2019-11-24 04:24:50,037 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2019-11-24 04:24:50,289 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-11-24 04:24:50,550 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 240 [2019-11-24 04:24:50,869 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 04:24:51,201 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 311 [2019-11-24 04:24:51,629 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 405 [2019-11-24 04:24:52,091 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 400 [2019-11-24 04:24:52,648 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 495 [2019-11-24 04:24:53,318 WARN L192 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 489 [2019-11-24 04:24:54,129 WARN L192 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 628 [2019-11-24 04:24:54,982 WARN L192 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 625 [2019-11-24 04:24:56,196 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 787 [2019-11-24 04:24:57,515 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 788 DAG size of output: 785 [2019-11-24 04:24:59,364 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 1010 [2019-11-24 04:25:01,460 WARN L192 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 1011 DAG size of output: 1007 [2019-11-24 04:25:04,400 WARN L192 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 1269 DAG size of output: 1266 [2019-11-24 04:25:07,648 WARN L192 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 1264 DAG size of output: 1260 [2019-11-24 04:25:12,579 WARN L192 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 1634 DAG size of output: 1630 [2019-11-24 04:25:18,339 WARN L192 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 1630 DAG size of output: 1585 [2019-11-24 04:25:24,181 WARN L192 SmtUtils]: Spent 5.53 s on a formula simplification that was a NOOP. DAG size: 1569 [2019-11-24 04:25:29,861 WARN L192 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 1570 DAG size of output: 1570 [2019-11-24 04:25:37,805 WARN L192 SmtUtils]: Spent 7.83 s on a formula simplification that was a NOOP. DAG size: 1950 [2019-11-24 04:25:46,592 WARN L192 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 1951 DAG size of output: 1947 [2019-11-24 04:25:58,564 WARN L192 SmtUtils]: Spent 11.84 s on a formula simplification. DAG size of input: 2424 DAG size of output: 2418 [2019-11-24 04:26:11,225 WARN L192 SmtUtils]: Spent 12.32 s on a formula simplification. DAG size of input: 2413 DAG size of output: 2406 [2019-11-24 04:26:24,777 WARN L192 SmtUtils]: Spent 12.70 s on a formula simplification that was a NOOP. DAG size: 2407