/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/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:26:12,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:26:12,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:26:12,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:26:12,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:26:12,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:26:12,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:26:12,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:26:12,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:26:12,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:26:12,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:26:12,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:26:12,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:26:12,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:26:12,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:26:12,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:26:12,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:26:12,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:26:12,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:26:12,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:26:12,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:26:12,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:26:12,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:26:12,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:26:12,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:26:12,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:26:12,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:26:12,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:26:12,689 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 04:26:12,711 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:26:12,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:26:12,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:26:12,713 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:26:12,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:26:12,714 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:26:12,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:26:12,715 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:26:12,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:26:12,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:26:12,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:26:12,716 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:26:12,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:26:12,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:26:12,717 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:26:12,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:26:12,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:26:12,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:26:12,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:26:12,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:26:12,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:26:12,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:26:12,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:26:12,720 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:26:12,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:26:12,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:26:12,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:26:12,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:26:12,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:26:12,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:26:12,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:26:12,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:26:12,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:26:12,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:26:12,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:26:12,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:26:12,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:26:12,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:26:13,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:26:13,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:26:13,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:26:13,032 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:26:13,032 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:26:13,033 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-11-24 04:26:13,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4efb0bb31/06b6125909284ac4a565356dadeeb655/FLAGef50dd576 [2019-11-24 04:26:13,541 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:26:13,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-11-24 04:26:13,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4efb0bb31/06b6125909284ac4a565356dadeeb655/FLAGef50dd576 [2019-11-24 04:26:13,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4efb0bb31/06b6125909284ac4a565356dadeeb655 [2019-11-24 04:26:13,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:26:13,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:26:13,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:26:13,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:26:13,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:26:13,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@675bbcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13, skipping insertion in model container [2019-11-24 04:26:13,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:26:13,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:26:14,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:26:14,164 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:26:14,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:26:14,195 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:26:14,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14 WrapperNode [2019-11-24 04:26:14,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:26:14,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:26:14,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:26:14,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:26:14,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:26:14,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:26:14,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:26:14,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:26:14,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (1/1) ... [2019-11-24 04:26:14,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:26:14,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:26:14,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:26:14,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:26:14,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (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 04:26:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:26:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:26:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:26:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:26:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:26:14,785 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:26:14,786 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:26:14,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:26:14 BoogieIcfgContainer [2019-11-24 04:26:14,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:26:14,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:26:14,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:26:14,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:26:14,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:26:13" (1/3) ... [2019-11-24 04:26:14,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cab5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:26:14, skipping insertion in model container [2019-11-24 04:26:14,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:14" (2/3) ... [2019-11-24 04:26:14,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cab5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:26:14, skipping insertion in model container [2019-11-24 04:26:14,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:26:14" (3/3) ... [2019-11-24 04:26:14,794 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-11-24 04:26:14,802 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:26:14,807 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:26:14,818 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:26:14,838 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:26:14,838 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:26:14,838 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:26:14,838 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:26:14,838 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:26:14,838 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:26:14,838 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:26:14,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:26:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 04:26:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:26:14,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:14,855 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:26:14,855 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1855951858, now seen corresponding path program 1 times [2019-11-24 04:26:14,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:14,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446740906] [2019-11-24 04:26:14,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,062 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 04:26:15,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446740906] [2019-11-24 04:26:15,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:26:15,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:26:15,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550883490] [2019-11-24 04:26:15,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:26:15,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:15,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:26:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:26:15,093 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-24 04:26:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:15,115 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-24 04:26:15,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:26:15,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 04:26:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:15,127 INFO L225 Difference]: With dead ends: 18 [2019-11-24 04:26:15,128 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:26:15,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:26:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:26:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:26:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:26:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-24 04:26:15,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-24 04:26:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:15,175 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-24 04:26:15,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:26:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-24 04:26:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:26:15,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:15,177 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:15,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1671495819, now seen corresponding path program 1 times [2019-11-24 04:26:15,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:15,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636883790] [2019-11-24 04:26:15,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,449 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 04:26:15,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636883790] [2019-11-24 04:26:15,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:26:15,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:26:15,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119980246] [2019-11-24 04:26:15,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:26:15,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:26:15,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:26:15,455 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2019-11-24 04:26:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:15,514 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-24 04:26:15,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:26:15,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:26:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:15,516 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:26:15,517 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:26:15,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:26:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:26:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 04:26:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 04:26:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-24 04:26:15,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-11-24 04:26:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:15,523 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-24 04:26:15,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:26:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-24 04:26:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:26:15,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:15,525 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:15,526 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1158536855, now seen corresponding path program 1 times [2019-11-24 04:26:15,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:15,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054802507] [2019-11-24 04:26:15,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054802507] [2019-11-24 04:26:15,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291520996] [2019-11-24 04:26:15,741 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 04:26:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:26:15,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:26:15,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:26:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,860 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:26:15,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:26:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875109356] [2019-11-24 04:26:15,959 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:26:15,960 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:26:15,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:26:15,980 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:26:15,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:26:16,099 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,140 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| 0)) [2019-11-24 04:26:18,260 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,281 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,316 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,341 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,372 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,519 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,541 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,562 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,581 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,597 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,640 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,655 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,671 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,709 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,726 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,772 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,790 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,815 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,833 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,845 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:21,215 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:26:21,466 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:26:21,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:26:21,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-11-24 04:26:21,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937727193] [2019-11-24 04:26:21,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 04:26:21,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 04:26:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-24 04:26:21,469 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2019-11-24 04:26:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:21,553 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-24 04:26:21,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:26:21,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2019-11-24 04:26:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:21,554 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:26:21,554 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 04:26:21,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:26:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 04:26:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 04:26:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 04:26:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-24 04:26:21,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-11-24 04:26:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:21,559 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-24 04:26:21,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 04:26:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-24 04:26:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:26:21,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:21,560 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:21,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:26:21,765 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2105638201, now seen corresponding path program 2 times [2019-11-24 04:26:21,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:21,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242830474] [2019-11-24 04:26:21,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:24,231 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 121 DAG size of output: 41 [2019-11-24 04:26:26,660 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 200 DAG size of output: 55 [2019-11-24 04:26:26,906 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 30 [2019-11-24 04:26:29,082 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 115 DAG size of output: 24 [2019-11-24 04:26:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:29,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242830474] [2019-11-24 04:26:29,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086264037] [2019-11-24 04:26:29,143 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:26:29,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:26:29,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:26:29,261 WARN L253 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-24 04:26:29,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:26:29,346 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:29,352 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:37,580 WARN L192 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2019-11-24 04:26:37,912 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-11-24 04:26:37,957 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:38,255 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2019-11-24 04:26:38,484 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2019-11-24 04:26:38,627 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-11-24 04:26:39,741 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2019-11-24 04:26:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:39,823 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:26:40,210 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2019-11-24 04:26:40,272 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:26:40,279 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:26:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:40,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491449632] [2019-11-24 04:26:40,310 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:26:40,311 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:26:40,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:26:40,311 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:26:40,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:26:40,323 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,359 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| 0)) [2019-11-24 04:26:42,411 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,463 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,476 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,487 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,499 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,509 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,518 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,528 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,543 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:42,745 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:26:44,510 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:26:44,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:26:44,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2019-11-24 04:26:44,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713357676] [2019-11-24 04:26:44,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-24 04:26:44,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-24 04:26:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=341, Unknown=2, NotChecked=0, Total=420 [2019-11-24 04:26:44,513 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 17 states. [2019-11-24 04:26:46,975 WARN L192 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2019-11-24 04:26:48,062 WARN L192 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-11-24 04:26:48,651 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-11-24 04:26:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:48,663 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-11-24 04:26:48,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-24 04:26:48,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2019-11-24 04:26:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:48,664 INFO L225 Difference]: With dead ends: 22 [2019-11-24 04:26:48,664 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 04:26:48,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=120, Invalid=478, Unknown=2, NotChecked=0, Total=600 [2019-11-24 04:26:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 04:26:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 04:26:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:26:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-24 04:26:48,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2019-11-24 04:26:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:48,670 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-24 04:26:48,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-24 04:26:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-24 04:26:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:26:48,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:48,671 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:48,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:26:48,876 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash -370706179, now seen corresponding path program 3 times [2019-11-24 04:26:48,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:48,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13139079] [2019-11-24 04:26:48,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:52,013 WARN L192 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 243 DAG size of output: 55 [2019-11-24 04:26:52,575 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 65 [2019-11-24 04:26:55,576 WARN L192 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 293 DAG size of output: 66 [2019-11-24 04:27:02,754 WARN L192 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 406 DAG size of output: 69 [2019-11-24 04:27:06,649 WARN L192 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 321 DAG size of output: 61 [2019-11-24 04:27:09,292 WARN L192 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 241 DAG size of output: 44 [2019-11-24 04:27:12,156 WARN L192 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 245 DAG size of output: 54 [2019-11-24 04:27:16,570 WARN L192 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 177 DAG size of output: 32 [2019-11-24 04:27:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:16,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13139079] [2019-11-24 04:27:16,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001324877] [2019-11-24 04:27:16,800 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:16,966 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-24 04:27:16,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:27:16,968 WARN L253 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-24 04:27:16,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:19,293 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:20,674 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-11-24 04:27:24,478 WARN L192 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-11-24 04:27:26,674 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 36 [2019-11-24 04:27:26,862 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-11-24 04:27:28,210 WARN L192 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-24 04:27:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:28,482 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:33,955 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2019-11-24 04:27:38,145 WARN L192 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2019-11-24 04:27:42,844 WARN L192 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-24 04:27:45,843 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 77 [2019-11-24 04:27:45,869 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:27:45,876 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:27:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:45,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117158173] [2019-11-24 04:27:45,919 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:27:45,919 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:45,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:45,920 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:45,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:45,932 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:47,970 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| 0)) [2019-11-24 04:27:48,008 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,018 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,033 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,044 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,057 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,083 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,108 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,120 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,161 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:48,276 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:50,392 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:27:50,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:50,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2019-11-24 04:27:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902414870] [2019-11-24 04:27:50,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-24 04:27:50,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-24 04:27:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1029, Unknown=4, NotChecked=0, Total=1190 [2019-11-24 04:27:50,395 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 31 states. [2019-11-24 04:27:54,389 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64