/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:19:51,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:19:51,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:19:51,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:19:51,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:19:51,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:19:51,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:19:51,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:19:51,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:19:51,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:19:51,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:19:51,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:19:51,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:19:51,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:19:51,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:19:51,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:19:51,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:19:51,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:19:51,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:19:51,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:19:51,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:19:51,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:19:51,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:19:51,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:19:51,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:19:51,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:19:51,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:19:51,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:19:51,389 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 04:19:51,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:19:51,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:19:51,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:19:51,425 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:19:51,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:19:51,429 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:19:51,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:19:51,429 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:19:51,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:19:51,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:19:51,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:19:51,430 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:19:51,430 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:19:51,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:19:51,431 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:19:51,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:19:51,433 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:19:51,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:19:51,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:19:51,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:19:51,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:19:51,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:19:51,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:19:51,434 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:19:51,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:19:51,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:19:51,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:19:51,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:19:51,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:19:51,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:19:51,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:19:51,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:19:51,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:19:51,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:19:51,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:19:51,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:19:51,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:19:51,438 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:19:51,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:19:51,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:19:51,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:19:51,738 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:19:51,738 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:19:51,739 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2019-11-24 04:19:51,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7220fdb/4b8ecf741bc44035ab67420412ba3619/FLAGd61113a5e [2019-11-24 04:19:52,280 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:19:52,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2019-11-24 04:19:52,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7220fdb/4b8ecf741bc44035ab67420412ba3619/FLAGd61113a5e [2019-11-24 04:19:52,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7220fdb/4b8ecf741bc44035ab67420412ba3619 [2019-11-24 04:19:52,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:19:52,718 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:19:52,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:52,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:19:52,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:19:52,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:52,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9b971f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52, skipping insertion in model container [2019-11-24 04:19:52,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:52,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:19:52,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:19:52,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:52,936 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:19:52,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:52,964 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:19:52,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52 WrapperNode [2019-11-24 04:19:52,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:52,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:52,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:19:52,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:19:52,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:52,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:53,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:19:53,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:19:53,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:19:53,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... [2019-11-24 04:19:53,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:19:53,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:19:53,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:19:53,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:19:53,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:19:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:19:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:19:53,434 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:19:53,434 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:19:53,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:53 BoogieIcfgContainer [2019-11-24 04:19:53,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:19:53,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:19:53,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:19:53,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:19:53,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:19:52" (1/3) ... [2019-11-24 04:19:53,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375e5ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:53, skipping insertion in model container [2019-11-24 04:19:53,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:52" (2/3) ... [2019-11-24 04:19:53,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375e5ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:53, skipping insertion in model container [2019-11-24 04:19:53,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:53" (3/3) ... [2019-11-24 04:19:53,456 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2019-11-24 04:19:53,476 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:19:53,483 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:19:53,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:19:53,516 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:19:53,516 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:19:53,516 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:19:53,516 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:19:53,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:19:53,516 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:19:53,517 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:19:53,517 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:19:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:19:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:19:53,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:53,533 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:19:53,534 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash 29776554, now seen corresponding path program 1 times [2019-11-24 04:19:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:53,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083923182] [2019-11-24 04:19:53,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:53,848 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 04:19:53,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083923182] [2019-11-24 04:19:53,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:53,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:19:53,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983540325] [2019-11-24 04:19:53,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:19:53,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:19:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:19:53,877 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 5 states. [2019-11-24 04:19:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:53,953 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-24 04:19:53,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:19:53,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-11-24 04:19:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:53,964 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:19:53,964 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:19:53,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:19:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:19:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:19:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:19:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:19:53,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:19:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:53,998 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:19:53,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:19:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:19:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:19:53,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:53,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:19:53,999 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 923029898, now seen corresponding path program 1 times [2019-11-24 04:19:54,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:54,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3680617] [2019-11-24 04:19:54,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:54,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3680617] [2019-11-24 04:19:54,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242868723] [2019-11-24 04:19:54,128 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 04:19:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:54,175 WARN L253 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-24 04:19:54,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:54,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:19:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:54,294 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:54,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381824258] [2019-11-24 04:19:54,358 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:19:54,359 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:19:54,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:19:54,376 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:19:54,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:19:55,064 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 269 [2019-11-24 04:19:55,251 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 266 [2019-11-24 04:19:55,622 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 446 [2019-11-24 04:19:55,950 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 442 [2019-11-24 04:19:56,580 WARN L192 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 766 [2019-11-24 04:19:57,344 WARN L192 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 763 DAG size of output: 752 [2019-11-24 04:19:58,807 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 1321 DAG size of output: 1315 [2019-11-24 04:20:00,847 WARN L192 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 1313 DAG size of output: 1312 [2019-11-24 04:20:07,217 WARN L192 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 2523 DAG size of output: 2477 [2019-11-24 04:20:13,231 WARN L192 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 2470 DAG size of output: 2466 [2019-11-24 04:20:21,161 WARN L192 SmtUtils]: Spent 5.87 s on a formula simplification that was a NOOP. DAG size: 2475 [2019-11-24 04:20:26,841 WARN L192 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 2476 DAG size of output: 2475 [2019-11-24 04:20:34,255 WARN L192 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 2486 [2019-11-24 04:20:40,081 WARN L192 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2487 [2019-11-24 04:20:57,948 WARN L192 SmtUtils]: Spent 17.55 s on a formula simplification. DAG size of input: 4729 DAG size of output: 4721 [2019-11-24 04:21:19,480 WARN L192 SmtUtils]: Spent 17.41 s on a formula simplification. DAG size of input: 4716 DAG size of output: 4711