java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-crafted/mapsum2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:30:19,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:30:19,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:30:19,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:30:19,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:30:19,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:30:19,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:30:19,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:30:19,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:30:19,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:30:19,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:30:19,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:30:19,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:30:19,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:30:19,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:30:19,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:30:19,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:30:19,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:30:19,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:30:19,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:30:19,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:30:19,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:30:19,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:30:19,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:30:19,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:30:19,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:30:19,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:30:19,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:30:19,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:30:19,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:30:19,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:30:19,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:30:19,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:30:19,981 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:30:19,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:30:19,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:30:19,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:30:19,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:30:19,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:30:19,983 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:30:19,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:30:19,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:30:19,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:30:19,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:30:19,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:30:19,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:30:19,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:30:19,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:30:19,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:30:19,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:30:19,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:30:19,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:30:19,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:30:20,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:30:20,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:30:20,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:30:20,285 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:30:20,285 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:30:20,286 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum2.i [2019-10-15 01:30:20,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f511679/a408b13afcd94c49af07a7f7b9d382f2/FLAGc323618ce [2019-10-15 01:30:20,787 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:30:20,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i [2019-10-15 01:30:20,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f511679/a408b13afcd94c49af07a7f7b9d382f2/FLAGc323618ce [2019-10-15 01:30:21,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f511679/a408b13afcd94c49af07a7f7b9d382f2 [2019-10-15 01:30:21,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:30:21,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:30:21,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:21,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:30:21,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:30:21,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e605b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21, skipping insertion in model container [2019-10-15 01:30:21,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,223 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:30:21,244 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:30:21,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:21,478 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:30:21,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:21,513 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:30:21,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21 WrapperNode [2019-10-15 01:30:21,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:21,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:30:21,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:30:21,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:30:21,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:30:21,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:30:21,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:30:21,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:30:21,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (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 [2019-10-15 01:30:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:30:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:30:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-10-15 01:30:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:30:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:30:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:30:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:30:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:30:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:30:22,084 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:30:22,084 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:30:22,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:22 BoogieIcfgContainer [2019-10-15 01:30:22,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:30:22,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:30:22,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:30:22,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:30:22,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:30:21" (1/3) ... [2019-10-15 01:30:22,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ad605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:22, skipping insertion in model container [2019-10-15 01:30:22,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21" (2/3) ... [2019-10-15 01:30:22,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ad605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:30:22, skipping insertion in model container [2019-10-15 01:30:22,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:22" (3/3) ... [2019-10-15 01:30:22,094 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2019-10-15 01:30:22,109 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:30:22,122 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:30:22,135 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:30:22,157 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:30:22,158 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:30:22,158 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:30:22,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:30:22,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:30:22,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:30:22,158 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:30:22,158 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:30:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:30:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:30:22,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:22,183 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:22,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-10-15 01:30:22,199 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:22,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908645605] [2019-10-15 01:30:22,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:30:22,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908645605] [2019-10-15 01:30:22,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:22,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:22,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076781375] [2019-10-15 01:30:22,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:22,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:22,415 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:30:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:22,466 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:30:22,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:22,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:30:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:22,478 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:30:22,478 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:30:22,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:30:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:30:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:30:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:30:22,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:30:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:22,538 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:30:22,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:30:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:30:22,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:22,541 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:22,542 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1641553888, now seen corresponding path program 1 times [2019-10-15 01:30:22,543 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:22,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883832588] [2019-10-15 01:30:22,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:22,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883832588] [2019-10-15 01:30:22,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599688560] [2019-10-15 01:30:22,663 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 [2019-10-15 01:30:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:30:22,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:22,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:30:22,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:30:22,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:30:22,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098792405] [2019-10-15 01:30:22,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:22,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:22,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:22,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:30:22,897 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:30:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:22,908 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:30:22,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:22,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:30:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:22,910 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:30:22,910 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:30:22,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:30:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:30:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:30:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:30:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:30:22,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:30:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:22,918 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:30:22,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:30:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:30:22,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:22,920 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:23,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:23,124 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1715048104, now seen corresponding path program 1 times [2019-10-15 01:30:23,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:23,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256741634] [2019-10-15 01:30:23,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:23,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256741634] [2019-10-15 01:30:23,213 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:23,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:23,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832546532] [2019-10-15 01:30:23,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:23,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:23,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:23,216 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:30:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:23,232 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:30:23,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:23,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:30:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:23,234 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:30:23,234 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:30:23,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:30:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:30:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:30:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:30:23,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:30:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:23,242 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:30:23,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:30:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:30:23,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:23,244 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:23,244 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1273676679, now seen corresponding path program 1 times [2019-10-15 01:30:23,245 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:23,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440118188] [2019-10-15 01:30:23,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:23,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440118188] [2019-10-15 01:30:23,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859353034] [2019-10-15 01:30:23,329 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 [2019-10-15 01:30:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:23,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:23,467 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:23,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559500054] [2019-10-15 01:30:23,534 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:23,534 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:23,541 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:23,549 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:23,550 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:23,694 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:25,814 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:25,857 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:25,861 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:26,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:26,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:30:26,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561275735] [2019-10-15 01:30:26,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:30:26,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:30:26,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:30:26,245 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:30:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:26,937 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:30:26,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:30:26,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:30:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:26,941 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:30:26,942 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:30:26,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:30:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:30:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:30:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:30:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:30:26,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:30:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:26,955 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:30:26,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:30:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:30:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:30:26,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:26,957 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:27,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:27,159 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash 811678230, now seen corresponding path program 2 times [2019-10-15 01:30:27,160 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:27,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296472100] [2019-10-15 01:30:27,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:27,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:27,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:30:27,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296472100] [2019-10-15 01:30:27,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888899561] [2019-10-15 01:30:27,286 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 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 [2019-10-15 01:30:27,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:30:27,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:27,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:27,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:30:27,395 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:30:27,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398772352] [2019-10-15 01:30:27,429 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:27,429 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:27,430 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:27,430 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:27,430 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:27,452 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:29,099 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:29,143 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:29,147 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:29,588 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:29,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:30:29,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403121040] [2019-10-15 01:30:29,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:30:29,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:30:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:30:29,591 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:30:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:30,580 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:30:30,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:30:30,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:30:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:30,582 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:30:30,582 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:30:30,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:30:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:30:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:30:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:30:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:30:30,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:30:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:30,591 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:30:30,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:30:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:30:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:30:30,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:30,592 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:30,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:30,796 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:30,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2095262385, now seen corresponding path program 3 times [2019-10-15 01:30:30,797 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:30,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019624367] [2019-10-15 01:30:30,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:30,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:30,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:30,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019624367] [2019-10-15 01:30:30,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197740557] [2019-10-15 01:30:30,915 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:31,062 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:31,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:31,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:30:31,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:31,089 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:31,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612636885] [2019-10-15 01:30:31,170 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:31,170 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:31,170 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:31,171 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:31,171 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:31,194 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:32,551 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:32,575 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:32,578 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:34,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:34,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:30:34,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601353272] [2019-10-15 01:30:34,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:30:34,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:34,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:30:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=515, Unknown=1, NotChecked=0, Total=650 [2019-10-15 01:30:34,917 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:30:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:35,963 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:30:35,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:30:35,963 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:30:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:35,964 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:30:35,964 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:30:35,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=369, Invalid=1700, Unknown=1, NotChecked=0, Total=2070 [2019-10-15 01:30:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:30:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:30:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:30:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:30:35,974 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:30:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:35,974 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:30:35,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:30:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:30:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:30:35,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:35,976 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:36,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:36,180 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2049115666, now seen corresponding path program 4 times [2019-10-15 01:30:36,182 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:36,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314529156] [2019-10-15 01:30:36,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:36,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:36,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314529156] [2019-10-15 01:30:36,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212254298] [2019-10-15 01:30:36,361 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:36,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:30:36,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,528 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:36,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783582017] [2019-10-15 01:30:36,851 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:36,852 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:36,852 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:36,853 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:36,854 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:36,880 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:38,210 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:38,246 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:38,251 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:38,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:38,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:30:38,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798684478] [2019-10-15 01:30:38,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:30:38,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:38,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:30:38,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:30:38,933 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:30:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:40,460 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:30:40,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:30:40,460 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:30:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:40,461 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:30:40,462 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:30:40,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 01:30:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:30:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:30:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:30:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:30:40,480 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:30:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:40,480 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:30:40,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:30:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:30:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:30:40,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:40,487 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:40,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:40,702 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -740285582, now seen corresponding path program 5 times [2019-10-15 01:30:40,703 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:40,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481256554] [2019-10-15 01:30:40,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:40,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:40,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:41,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481256554] [2019-10-15 01:30:41,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585417723] [2019-10-15 01:30:41,133 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:41,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:41,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:41,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:41,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 01:30:41,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 01:30:41,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311639536] [2019-10-15 01:30:41,392 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:41,393 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:41,393 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:41,394 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:41,394 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:41,417 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:42,737 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:42,761 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:42,764 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:43,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:43,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:43,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448295752] [2019-10-15 01:30:43,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:43,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:43,287 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:45,547 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:45,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:45,547 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:45,548 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:45,548 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:45,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:30:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:45,560 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:45,560 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:45,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:45,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:45,562 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:45,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:45,766 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1983049792, now seen corresponding path program 6 times [2019-10-15 01:30:45,767 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:45,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937834212] [2019-10-15 01:30:45,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:45,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:45,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:46,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937834212] [2019-10-15 01:30:46,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116394237] [2019-10-15 01:30:46,185 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:46,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:46,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:46,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:46,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:46,447 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:47,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116763636] [2019-10-15 01:30:47,389 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:47,389 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:47,389 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:47,390 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:47,390 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:47,417 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:48,585 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:48,608 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:48,611 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:49,292 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:49,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:49,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748621586] [2019-10-15 01:30:49,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:49,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:49,296 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:52,741 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:52,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:52,742 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:52,743 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:52,743 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:52,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:30:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:52,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:52,758 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:52,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:52,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:52,761 INFO L380 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:52,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:52,965 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1441308797, now seen corresponding path program 7 times [2019-10-15 01:30:52,966 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:52,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933982023] [2019-10-15 01:30:52,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:52,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:52,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:54,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933982023] [2019-10-15 01:30:54,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401849864] [2019-10-15 01:30:54,353 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:54,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:54,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:54,650 INFO L321 TraceCheckSpWp]: Computing backward predicates...