/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_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:51,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:51,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:51,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:15:51,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:51,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:51,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:51,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:51,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:51,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:51,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:51,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:51,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:51,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:51,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:51,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:51,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:15:51,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:15:51,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:15:51,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:15:51,946 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 23:15:51,961 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:51,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:51,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:51,962 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:51,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:51,962 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:51,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:51,963 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:51,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:51,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:51,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:51,963 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:51,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:51,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:51,965 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:51,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:51,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:51,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:51,967 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:51,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:51,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:51,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:51,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:51,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:51,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:51,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:51,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:51,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:51,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:51,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:51,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:51,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:51,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:52,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:52,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:52,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:52,248 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:52,248 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:52,249 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-11-23 23:15:52,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64421b86c/7ef38090b4b94c46bf996d5a5bdb2c10/FLAGa3f3a6fa0 [2019-11-23 23:15:52,768 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:52,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-11-23 23:15:52,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64421b86c/7ef38090b4b94c46bf996d5a5bdb2c10/FLAGa3f3a6fa0 [2019-11-23 23:15:53,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64421b86c/7ef38090b4b94c46bf996d5a5bdb2c10 [2019-11-23 23:15:53,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:53,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:53,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:53,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:53,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:53,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b71a68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53, skipping insertion in model container [2019-11-23 23:15:53,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:53,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:53,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:53,365 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:53,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:53,398 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:53,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53 WrapperNode [2019-11-23 23:15:53,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:53,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:53,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:53,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:53,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:53,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:53,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:53,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:53,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (1/1) ... [2019-11-23 23:15:53,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:53,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:53,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:53,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:53,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (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 23:15:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:53,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:53,968 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:53,969 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:53,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:53 BoogieIcfgContainer [2019-11-23 23:15:53,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:53,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:53,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:53,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:53,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:53" (1/3) ... [2019-11-23 23:15:53,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4438ad5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:53, skipping insertion in model container [2019-11-23 23:15:53,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:53" (2/3) ... [2019-11-23 23:15:53,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4438ad5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:53, skipping insertion in model container [2019-11-23 23:15:53,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:53" (3/3) ... [2019-11-23 23:15:53,979 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2019-11-23 23:15:53,998 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:54,004 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:54,015 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:54,035 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:54,036 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:54,036 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:54,036 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:54,036 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:54,036 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:54,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:54,036 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:54,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:54,054 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:54,054 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:15:54,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:54,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106929448] [2019-11-23 23:15:54,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:54,204 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 23:15:54,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106929448] [2019-11-23 23:15:54,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:54,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:54,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949374973] [2019-11-23 23:15:54,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:54,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:54,226 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:54,281 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:54,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:54,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:54,299 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:54,299 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:54,305 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 23:15:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:54,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:54,341 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:54,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:54,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:54,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:54,342 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -610925648, now seen corresponding path program 1 times [2019-11-23 23:15:54,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:54,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998659661] [2019-11-23 23:15:54,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:15:54,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998659661] [2019-11-23 23:15:54,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870960582] [2019-11-23 23:15:54,404 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 23:15:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:54,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:54,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:54,478 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:54,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:54,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137957619] [2019-11-23 23:15:54,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:54,501 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:54,545 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:54,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:54,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:54,546 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:54,546 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:54,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:54,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:54,553 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:54,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:54,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:54,554 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:54,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:54,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1417050161, now seen corresponding path program 1 times [2019-11-23 23:15:54,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:54,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317939368] [2019-11-23 23:15:54,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:54,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317939368] [2019-11-23 23:15:54,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677349736] [2019-11-23 23:15:54,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 23:15:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:54,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:54,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:54,917 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:54,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1926375995] [2019-11-23 23:15:55,009 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:55,010 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:55,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:55,030 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:55,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:15:56,433 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2019-11-23 23:15:57,080 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2019-11-23 23:15:57,307 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 140 [2019-11-23 23:15:59,632 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-23 23:15:59,857 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 168 [2019-11-23 23:16:07,517 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 200 [2019-11-23 23:16:22,537 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 239 [2019-11-23 23:16:30,732 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 259 [2019-11-23 23:16:38,181 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 274 [2019-11-23 23:16:39,989 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 279 [2019-11-23 23:16:40,097 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 276 [2019-11-23 23:16:40,332 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 277 [2019-11-23 23:16:40,544 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-11-23 23:16:44,571 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-23 23:16:46,590 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 290 [2019-11-23 23:16:50,714 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 300 [2019-11-23 23:16:50,836 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 295 [2019-11-23 23:16:51,047 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 295 [2019-11-23 23:16:51,259 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 298 [2019-11-23 23:16:53,347 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2019-11-23 23:16:53,482 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 303 [2019-11-23 23:16:55,635 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:16:55,775 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2019-11-23 23:16:58,031 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-23 23:16:58,174 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 309 [2019-11-23 23:17:00,258 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 311 [2019-11-23 23:17:00,400 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 311 [2019-11-23 23:17:02,628 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 314 [2019-11-23 23:17:02,771 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 314 [2019-11-23 23:17:02,902 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-23 23:17:03,018 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2019-11-23 23:17:05,287 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-23 23:17:05,418 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 321 [2019-11-23 23:17:05,563 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 23:17:05,694 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 324 [2019-11-23 23:17:08,666 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 23:17:08,873 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-23 23:17:11,237 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 336 [2019-11-23 23:17:11,395 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 332 [2019-11-23 23:17:13,759 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 23:17:13,904 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:17:16,935 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:17:17,070 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 23:17:19,649 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 23:17:19,791 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-23 23:17:22,425 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:17:22,607 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 345 [2019-11-23 23:17:22,751 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 23:17:22,877 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 23:17:25,635 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:17:25,788 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 348 [2019-11-23 23:17:25,964 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:17:26,104 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349