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/mapsum3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:30:20,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:30:20,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:30:20,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:30:20,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:30:20,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:30:20,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:30:20,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:30:20,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:30:20,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:30:20,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:30:20,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:30:20,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:30:20,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:30:20,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:30:20,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:30:20,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:30:20,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:30:20,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:30:20,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:30:20,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:30:20,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:30:20,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:30:20,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:30:20,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:30:20,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:30:20,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:30:20,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:30:20,120 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 01:30:20,151 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:30:20,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:30:20,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:30:20,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:30:20,155 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:30:20,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:30:20,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:30:20,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:30:20,160 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:30:20,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:30:20,160 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:30:20,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:30:20,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:30:20,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:30:20,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:30:20,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:30:20,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:30:20,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:30:20,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:30:20,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:30:20,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:30:20,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:30:20,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:30:20,164 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 01:30:20,432 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:30:20,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:30:20,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:30:20,450 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:30:20,450 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:30:20,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum3.i [2019-10-15 01:30:20,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73382b139/22e56e9736ef4c009b627d3820b7cc96/FLAG66f4a6d96 [2019-10-15 01:30:20,957 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:30:20,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum3.i [2019-10-15 01:30:20,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73382b139/22e56e9736ef4c009b627d3820b7cc96/FLAG66f4a6d96 [2019-10-15 01:30:21,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73382b139/22e56e9736ef4c009b627d3820b7cc96 [2019-10-15 01:30:21,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:30:21,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:30:21,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:21,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:30:21,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:30:21,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538e7e77 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 01:30:21,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:30:21" (1/1) ... [2019-10-15 01:30:21,413 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:30:21,433 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:30:21,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:21,655 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:30:21,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:30:21,704 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:30:21,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:30:21 WrapperNode [2019-10-15 01:30:21,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:30:21,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:30:21,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:30:21,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:30:21,801 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 01:30:21,802 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 01:30:21,810 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 01:30:21,811 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 01:30:21,819 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 01:30:21,824 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 01:30:21,826 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 01:30:21,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:30:21,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:30:21,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:30:21,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:30:21,830 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 01:30:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:30:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:30:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-10-15 01:30:21,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:30:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:30:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:30:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-10-15 01:30:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:30:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:30:22,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:30:22,259 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:30:22,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:30:22 BoogieIcfgContainer [2019-10-15 01:30:22,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:30:22,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:30:22,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:30:22,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:30:22,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:30:21" (1/3) ... [2019-10-15 01:30:22,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f26925 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 01:30:22,267 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 01:30:22,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f26925 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 01:30:22,267 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 01:30:22,269 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum3.i [2019-10-15 01:30:22,281 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:30:22,290 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:30:22,302 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:30:22,327 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:30:22,327 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:30:22,327 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:30:22,327 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:30:22,327 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:30:22,327 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:30:22,327 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:30:22,328 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:30:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:30:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:30:22,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:22,354 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 01:30:22,356 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-10-15 01:30:22,368 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:22,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386637930] [2019-10-15 01:30:22,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,553 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 01:30:22,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386637930] [2019-10-15 01:30:22,555 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:22,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:22,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861928295] [2019-10-15 01:30:22,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:22,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:22,580 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:30:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:22,619 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:30:22,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:22,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:30:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:22,631 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:30:22,631 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:30:22,635 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 01:30:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:30:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:30:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:30:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:30:22,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:30:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:22,705 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:30:22,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:30:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:30:22,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:22,711 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 01:30:22,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1641553888, now seen corresponding path program 1 times [2019-10-15 01:30:22,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:22,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339481794] [2019-10-15 01:30:22,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:22,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,866 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 01:30:22,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339481794] [2019-10-15 01:30:22,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322294712] [2019-10-15 01:30:22,867 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 01:30:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:22,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:30:22,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:23,014 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 01:30:23,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:23,056 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 01:30:23,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:30:23,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:30:23,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300033549] [2019-10-15 01:30:23,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:23,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:30:23,060 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:30:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:23,071 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:30:23,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:23,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:30:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:23,073 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:30:23,073 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:30:23,074 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 01:30:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:30:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:30:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:30:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:30:23,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:30:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:23,082 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:30:23,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:30:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:30:23,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:23,084 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 01:30:23,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:23,293 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1715048104, now seen corresponding path program 1 times [2019-10-15 01:30:23,296 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:23,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738482503] [2019-10-15 01:30:23,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,382 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 01:30:23,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738482503] [2019-10-15 01:30:23,383 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:30:23,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:30:23,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399712876] [2019-10-15 01:30:23,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:30:23,384 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:30:23,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:30:23,385 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:30:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:23,400 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:30:23,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:30:23,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:30:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:23,402 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:30:23,403 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:30:23,404 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 01:30:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:30:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:30:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:30:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:30:23,415 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:30:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:23,420 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:30:23,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:30:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:30:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:30:23,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:23,422 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 01:30:23,422 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:23,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1273676679, now seen corresponding path program 1 times [2019-10-15 01:30:23,423 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:23,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013562825] [2019-10-15 01:30:23,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:23,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,546 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 01:30:23,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013562825] [2019-10-15 01:30:23,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017360655] [2019-10-15 01:30:23,547 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 01:30:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:23,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:23,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:23,650 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 01:30:23,650 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:23,690 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 01:30:23,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711084884] [2019-10-15 01:30:23,716 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:23,716 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:23,723 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:23,731 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:23,732 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:23,884 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:25,965 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:26,032 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:26,038 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:26,448 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:26,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:30:26,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243090011] [2019-10-15 01:30:26,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:30:26,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:30:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:30:26,453 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:30:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:27,103 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:30:27,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:30:27,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:30:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:27,104 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:30:27,104 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:30:27,105 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 01:30:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:30:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:30:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:30:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:30:27,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:30:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:27,113 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:30:27,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:30:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:30:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:30:27,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:27,115 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 01:30:27,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:27,317 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 811678230, now seen corresponding path program 2 times [2019-10-15 01:30:27,319 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:27,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573974602] [2019-10-15 01:30:27,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:27,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:27,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:27,396 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 01:30:27,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573974602] [2019-10-15 01:30:27,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233632460] [2019-10-15 01:30:27,397 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 01:30:27,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:30:27,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:27,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:27,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:27,497 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 01:30:27,499 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:27,534 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 01:30:27,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [699594347] [2019-10-15 01:30:27,536 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:27,536 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:27,537 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:27,537 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:27,537 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:27,560 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:29,120 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:29,181 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:29,187 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:29,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:29,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:30:29,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583383244] [2019-10-15 01:30:29,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:30:29,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:30:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:30:29,572 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:30:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:30,475 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:30:30,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:30:30,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:30:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:30,476 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:30:30,477 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:30:30,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:30:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:30:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:30:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:30:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:30:30,495 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:30:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:30,496 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:30:30,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:30:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:30:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:30:30,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:30,498 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 01:30:30,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:30,700 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2095262385, now seen corresponding path program 3 times [2019-10-15 01:30:30,701 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:30,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730657734] [2019-10-15 01:30:30,702 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:30,702 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:30,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:30,845 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 01:30:30,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730657734] [2019-10-15 01:30:30,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151885529] [2019-10-15 01:30:30,846 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 01:30:30,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:30,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:30,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:30:30,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:30,984 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 01:30:30,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:31,057 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 01:30:31,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487640825] [2019-10-15 01:30:31,060 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:31,060 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:31,061 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:31,061 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:31,061 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:31,080 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:32,402 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:32,435 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:32,438 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:32,885 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:32,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:30:32,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097856923] [2019-10-15 01:30:32,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:30:32,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:30:32,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:30:32,892 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:30:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:34,025 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:30:34,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:30:34,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:30:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:34,026 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:30:34,027 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:30:34,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:30:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:30:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:30:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:30:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:30:34,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:30:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:34,037 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:30:34,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:30:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:30:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:30:34,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:34,038 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 01:30:34,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:34,244 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:34,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2049115666, now seen corresponding path program 4 times [2019-10-15 01:30:34,245 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:34,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892225925] [2019-10-15 01:30:34,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:34,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:34,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:34,422 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 01:30:34,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892225925] [2019-10-15 01:30:34,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387189873] [2019-10-15 01:30:34,423 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 01:30:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:34,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:30:34,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:34,581 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 01:30:34,581 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:34,935 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 01:30:34,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796644516] [2019-10-15 01:30:34,937 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:34,938 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:34,938 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:34,939 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:34,939 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:34,958 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:36,209 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:36,233 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:36,237 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:36,664 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:36,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:30:36,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161985766] [2019-10-15 01:30:36,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:30:36,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:30:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:30:36,667 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:30:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:38,358 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:30:38,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:30:38,358 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:30:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:38,360 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:30:38,360 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:30:38,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 01:30:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:30:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:30:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:30:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:30:38,374 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:30:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:38,374 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:30:38,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:30:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:30:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:30:38,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:38,376 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 01:30:38,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:38,581 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -740285582, now seen corresponding path program 5 times [2019-10-15 01:30:38,582 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:38,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767150919] [2019-10-15 01:30:38,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:38,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:38,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:39,002 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 01:30:39,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767150919] [2019-10-15 01:30:39,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913536494] [2019-10-15 01:30:39,003 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 01:30:39,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:39,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:39,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:39,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:39,212 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 01:30:39,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:39,260 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 01:30:39,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889624820] [2019-10-15 01:30:39,262 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:39,262 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:39,263 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:39,263 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:39,263 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:39,277 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:40,506 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:40,538 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:40,541 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:41,193 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:41,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:41,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501910622] [2019-10-15 01:30:41,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:41,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:41,196 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:45,162 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:45,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:45,162 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:45,163 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:45,164 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:45,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:30:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:45,176 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:45,177 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:45,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:45,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:45,178 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 01:30:45,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:45,382 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1983049792, now seen corresponding path program 6 times [2019-10-15 01:30:45,383 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:45,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945198667] [2019-10-15 01:30:45,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:45,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:45,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:45,791 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 01:30:45,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945198667] [2019-10-15 01:30:45,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799898390] [2019-10-15 01:30:45,791 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 01:30:46,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:46,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:46,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:46,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:46,039 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 01:30:46,040 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:47,155 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 01:30:47,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815104011] [2019-10-15 01:30:47,157 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:47,157 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:47,157 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:47,157 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:47,158 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:47,172 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:48,416 INFO L199 IcfgInterpreter]: Interpreting procedure mapsum with input of size 1 for LOIs [2019-10-15 01:30:48,446 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:48,450 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:49,041 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:49,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:49,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372397532] [2019-10-15 01:30:49,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:49,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:49,046 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:52,446 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:52,447 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:52,448 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:52,449 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:52,454 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 01:30:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:52,464 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:52,464 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:52,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:52,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:52,466 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 01:30:52,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:52,676 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1441308797, now seen corresponding path program 7 times [2019-10-15 01:30:52,677 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:52,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803516733] [2019-10-15 01:30:52,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:52,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:52,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:54,176 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 01:30:54,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803516733] [2019-10-15 01:30:54,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010031008] [2019-10-15 01:30:54,176 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 01:30:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:54,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:54,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:54,468 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 01:30:54,469 INFO L321 TraceCheckSpWp]: Computing backward predicates...