/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/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:09:28,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:09:28,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:09:28,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:09:28,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:09:28,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:09:28,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:09:28,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:09:28,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:09:28,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:09:28,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:09:28,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:09:28,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:09:28,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:09:28,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:09:28,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:09:28,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:09:28,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:09:28,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:09:28,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:09:28,953 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 [2019-11-23 23:09:28,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:09:28,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:09:28,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:09:28,980 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:09:28,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:09:28,981 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:09:28,981 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:09:28,981 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:09:28,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:09:28,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:09:28,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:09:28,982 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:09:28,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:09:28,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:09:28,983 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:09:28,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:09:28,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:09:28,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:09:28,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:09:28,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:09:28,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:09:28,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:09:28,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:09:28,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:09:28,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:09:28,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:09:28,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:09:28,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:09:28,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:09:28,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:09:28,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:09:28,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:09:28,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:09:28,987 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:09:28,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:09:28,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:09:28,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:09:28,988 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:09:29,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:09:29,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:09:29,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:09:29,284 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:09:29,284 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:09:29,284 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-23 23:09:29,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d80d1d6/1c36bc8c0dee481dbb560c34775024a4/FLAGb1f2b5c93 [2019-11-23 23:09:29,785 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:09:29,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-23 23:09:29,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d80d1d6/1c36bc8c0dee481dbb560c34775024a4/FLAGb1f2b5c93 [2019-11-23 23:09:30,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d80d1d6/1c36bc8c0dee481dbb560c34775024a4 [2019-11-23 23:09:30,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:09:30,174 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:09:30,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:30,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:09:30,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:09:30,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ecbcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30, skipping insertion in model container [2019-11-23 23:09:30,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:09:30,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:09:30,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:30,386 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:09:30,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:30,431 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:09:30,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30 WrapperNode [2019-11-23 23:09:30,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:30,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:30,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:09:30,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:09:30,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:30,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:09:30,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:09:30,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:09:30,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (1/1) ... [2019-11-23 23:09:30,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:09:30,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:09:30,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:09:30,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:09:30,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (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 [2019-11-23 23:09:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:09:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:09:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:09:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:09:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:09:30,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:09:30,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:09:30,981 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 23:09:30,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:30 BoogieIcfgContainer [2019-11-23 23:09:30,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:09:30,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:09:30,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:09:30,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:09:30,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:09:30" (1/3) ... [2019-11-23 23:09:30,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597d2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:30, skipping insertion in model container [2019-11-23 23:09:30,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:30" (2/3) ... [2019-11-23 23:09:30,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597d2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:30, skipping insertion in model container [2019-11-23 23:09:30,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:30" (3/3) ... [2019-11-23 23:09:30,989 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-11-23 23:09:30,997 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:09:31,003 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:09:31,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:09:31,035 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:09:31,035 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:09:31,035 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:09:31,035 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:09:31,035 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:09:31,035 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:09:31,035 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:09:31,035 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:09:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:09:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:09:31,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:31,053 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:31,054 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash -989578123, now seen corresponding path program 1 times [2019-11-23 23:09:31,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:31,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273969056] [2019-11-23 23:09:31,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:09:31,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273969056] [2019-11-23 23:09:31,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:09:31,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:09:31,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206237616] [2019-11-23 23:09:31,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:09:31,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:09:31,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:09:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:09:31,224 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 23:09:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:09:31,331 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2019-11-23 23:09:31,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:09:31,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 23:09:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:09:31,346 INFO L225 Difference]: With dead ends: 30 [2019-11-23 23:09:31,347 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:09:31,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:09:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:09:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 23:09:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 23:09:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-11-23 23:09:31,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2019-11-23 23:09:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:09:31,398 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-23 23:09:31,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:09:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-11-23 23:09:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 23:09:31,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:31,400 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:31,400 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1173254140, now seen corresponding path program 1 times [2019-11-23 23:09:31,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:31,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155800580] [2019-11-23 23:09:31,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 23:09:31,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155800580] [2019-11-23 23:09:31,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656487595] [2019-11-23 23:09:31,454 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 [2019-11-23 23:09:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:31,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:09:31,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:09:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 23:09:31,561 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:09:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 23:09:31,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428554904] [2019-11-23 23:09:31,605 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-23 23:09:31,606 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:09:31,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:09:31,619 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:09:31,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:09:55,766 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 214 [2019-11-23 23:09:56,018 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 217 [2019-11-23 23:10:19,736 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2019-11-23 23:10:27,388 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-23 23:10:27,521 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 291 [2019-11-23 23:10:53,113 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 23:10:58,441 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352 [2019-11-23 23:11:01,040 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 352